CHANGELOG

Differences Between DuMuX 2.3 and DuMuX 2.4
===================================================

* IMPROVEMENTS and ENHANCEMENTS:
  - Three geomechanics models have been added, thanks to the previous PhD work
    of Melanie Darcis. The models are located in dumux/geomechanics, a test for
    each model is provided in test/geomechanics:
    . elastic: linear elasticity equations that account only for the solid
               mechanics.
    . el1p2c:  poroelasticity equations for one solid and one fluid phase, where
               the fluid phase is admitted to consist of two components.
    . el2p:    poroelasticity equations for one solid phase and two immiscible
               fluid phases.

  - The MPNC model now allows to drop the assumptions of local thermal and/or
    chemical equilibrium. Dropping the local chemical equilibrium assumption
    leads to mole fractions in different phases that are not determined via
    equilibrium relations. If the local thermal equilibrium assumption is
    dropped, phases (fluids and solid) are locally allowed to have different
    temperatures. See test/implicit/mpnc/test_boxmpnckinetic for an example.

  - A fully-implicit three-phase immiscible model has been added. The headers
    are contained in dumux/implicit/3p, tests are provided in test/implicit/3p.

  - The handling of Dirichlet boundary conditions for the fully-implicit cell-
    centered models has been improved. Now, the conditions are evaluated at the
    centers of the corresponding boundary faces. In general, they are
    incorporated into the local residual in a weak sense. Only for mixed
    Dirichlet/Neumann conditions and for the MPNC model, they still are
    incorporated in a strong sense.

  - All fully-implicit porous-media models now provide the possibility to write
    the velocities to the VTK output. This can be achieved by setting the
    parameter "AddVelocity" of the group "Vtk" or the corresponding property 
    "VtkAddVelocity." See test/implicit/1p2c for an example.

  - Our naming rules have been refined and enforced for member functions and
    variables. Many inconsistencies could be removed, especially the special
    status of the capitalized "S" indicating saturation. See the deprecation
    listings below or FS#180 for details.

  - Misleading names in the fully-implicit models that still contained "b/Box"
    have been replaced by more generic ones. See the deprecation listings below
    or FS#194 for details.

  - The ...FVElementGeometry classes have been cleaned up a bit. See the 
    deprecation listings below or FS#192 for details.

* IMMEDIATE INTERFACE CHANGES not allowing/requiring a deprecation period:

* Deprecated CLASSES/FILES, to be removed after 2.4:
  - OnePBoxModel, OnePTwoCBoxModel -> OnePModel, OnePTwoCModel

  - Headers containing capitalized letters are replaced by their non-capitalized
    analogs. 
    In dumux/decoupled: 1p/cellData1p.hh, 1p/fluxData1p.hh, 
    2p/cellData2padaptive.hh, 2p/fluxData2p.hh, 2p/cellData2p.hh,
    2p2c/cellData2p2c.hh, 2p2c/cellData2p2cadaptive.hh, 2p2c/fluxData2p2c.hh,
    2p2c/cellData2p2cmultiphysics.hh.
    In dumux/material/fluidmatrixinteractions/3p: parkerVanGen3p.hh,
    parkerVanGen3pparams.hh.

* Deprecated PROPERTY NAMES, to be removed after 2.4: BEWARE: The compiler will
  not print any warning if a deprecated property name is used.

* Deprecated CONSTANTS/ENUMS, to be removed after 2.4: BEWARE: Older compilers 
  will not print any warning if a deprecated constant/enum is used.
  - saturation indices: S0Idx, SnIdx, SnOrXIdx, SOrX1Idx, SOrX2Idx, SwIdx, 
    SwOrXIdx
    -> s0Idx, snIdx, snOrXIdx, sOrX1Idx, sOrX2Idx, swIdx, swOrXIdx

  - two-phase formulations: pnSn, pnSw, pwSn, pwSw -> pnsn, pnsw, pwsn, pwsw

  - DecoupledTwoPCommonIndices: pressureNW, saturationNW, velocityNW 
    -> pressureNw, saturationNw, velocityNw

  - DecoupledTwoPIndices: pressEqIdx -> pressureEqIdx

  - MPNCIndices: NumPrimaryEnergyVars, NumPrimaryVars
    -> numPrimaryEnergyVars, numPrimaryVars

* Deprecated public MEMBER VARIABLES, to be removed after 2.4: BEWARE: Older
  compilers will not print any warning if a deprecated public member variable 
  is used.
  - ...FVElementGeometry: numEdges, numFaces, numFap, numVertices
    -> numScvf, -, numFap of each subcontrolvolume face, numScv

  - BoxFVElementGeometry: edgeCoord, faceCoord

* Deprecated MACROS, to be removed after 2.4: BEWARE: The compiler will not
  print any warning if a deprecated macro is used.
  - DUMUX_ALWAYS_INLINE whether the according attribute is supported

* Deprecated MEMBER FUNCTIONS, to be removed after 2.4:
  - all problems: bboxMin/Max() -> bBoxMin/Max()

  - ImplicitProblem: boxSDNeumann(), boxSDSource()
    -> solDependentNeumann(), solDependentSource()

  - ImplicitPorousMediaProblem: boxGravity(), boxTemperature() 
    -> gravityAtPos(), temperatureAtPos() (different signatures!)

  - fluid-matrix-interactions: dkrn_dSw(), dkrw_dSw(), dpc_dSw(), pC(), 
    dSw_dpC(), Sgr(), Snr(), SnToSne(), Sw(), Swr(), SwToSwe()
    -> dkrn_dsw(), dkrw_dsw(), dpc_dsw(), pc(), dsw_dpc(), sgr(), snr(), 
    snToSne(), sw(), swr(), swToSwe()

  - LinearMaterial(Params): entryPC(), maxPC(), setEntryPC(), setMaxPC() 
    -> entryPc(), maxPc(), setEntryPc(), setMaxPc()

  - RegularizedVanGenuchten(Params): pCHighSw(), pCLowSw() 
    -> pcHighSw(), pcLowSw()

  - VanGenuchtenParams, ParkerVanGen3PParams: setVgM(), setVgN(), vgM(), vgN()
    -> setVgm(), setVgn(), vgm(), vgn()

  - ParkerVanGen3P(Params): betaGN(), betaGW(), betaNW(), pCAlpha(), pCGN(), 
    pCGW(), pCNW(), setBeta..., setkrRegardsSnr(), Swrx()
    -> betaGn(), betaGw(), betaNw(), pcAlpha(), pcgn(), pcgw(), pcnw(), 
    setBeta..., setKrRegardsSnr(), swrx()

  - MPLinearMaterialParams: Sreg() -> sReg()

  - EvalCflFlux...: getCFLFluxFunction() -> getCflFluxFunction

  - FVMPFAOInteractionVolume: getNTKNu_by_dF(), getNTKNu(), getNTKrKNu_by_dF(), 
    getNTKrKNu()
    -> getNtkNu_df(), getNtkNu(), getNtkrkNu_df(), getNtkrkNu()

  - TwoPDFMVolumeVariables: dSM_dSF() -> dsm_dsf()

  - Stokes...Variables: viscosity() -> dynamicViscosity()

  - IAPWS water: ddgamma_ddpi, ddgamma_ddtau, ddgamma_dtaudpi, dgamma_dpi, 
    dgamma_dtau, dp_dpi, dpi_dp, dtau_dt 
    -> ddGamma_ddPi, ddGamma_ddTau, ddGamma_dTaudPi, dGamma_dPi, dGamma_dTau, 
    dp_dPi, dPi_dp, dTau_dt

* DELETED classes/files, property names, constants/enums, 
  member functions/variables, which have been deprecated in DuMuX 2.3:
  Everything listed as deprecated below has been removed.


Differences Between DuMuX 2.2 and DuMuX 2.3
===================================================

* IMPROVEMENTS and ENHANCEMENTS:
  - A fully implicit two-phase discrete-fracture-matrix model has been added, 
    see test/implicit/2pdfm.

  - Almost all porous media fully implicit models now can either use a
    vertex-centered (box) or a cell-centered spatial discretization. The choice
    of the spatial discretization method is controlled by deriving the problem
    type tag either from BoxModel or CCModel. This allows for a uniform problem
    description, as long as the boundaryTypesAtPos and dirichletAtPos methods
    can be used. By evaluating the compile-time property ImplicitIsBox, it is 
    easily possible to separately handle the different discretizations inside 
    am common method. See the tests in test/implicit for examples. 
    Correspondingly, the directory structure has been adapted. 
    Old:             New:
    dumux/           dumux/
      boxmodels/       implicit/
        common/          common/
        1p/              box/
        1p2c/            cellcentered/
        2p/              1p/
        ...              ...
    test/            test/
      boxmodels/       implicit/
        1p/              1p/
          test_1p          test_box1p
        ...                test_cc1p
                         ...

  - A backend for the ISTL AMG solver has been included, based on the
    corresponding DUNE-PDELab backends. It can be used for the fully 
    implicit and the decoupled models, see test_*1pwithamg in 
    test/implicit/1p and test_impeswithamg in test/decoupled/2p. 
    DUNE-PDELab and possibly DUNE-ISTL have to be patched, see the file 
    README in the patches directory. 

  - The decoupled models have been parallelized, see test_impeswithamg in 
    test/decoupled/2p. They work in parallel only if the AMGBackend is used 
    as linear solver. No dynamic loadbalancing can be done yet. 

  - The MPNC model can use either the most wetting or the most non-wetting phase
    pressure as primary variable. This is controlled via the property 
    "PressureFormulation."

  - The table of available parameters has been improved, see 
    http://www.dumux.org/doxygen-stable/html-2.2/a00838.php

  - Improved handling of the conductive heat fluxes in the non-isothermal implicit  
    two-phase models, see the problem files in test/implicit/2p(2c)ni.

  - Introduced new selection of start/stop messages.

* IMMEDIATE INTERFACE CHANGES not allowing/requiring a deprecation period:
  - The property Salinity used in the BrineCO2FluidSystem 
    has been renamed to ProblemSalinity. 

  - The matrixHeatFlux(...) and boundaryMatrixHeatFlux(...) methods in the spatial
    parameters of nonisothermal implicit twophase models have been removed.
    Instead, the computation of the effective thermal conductivity has been sourced 
    out to the fluidmatrixinteractions in a separate file 
    dumux/material/fluidmatrixinteractions/thermalconductivitysomerton.hh, which
    can be exchanged. The spatial parameters file needs a method 
    thermalConductivitySolid(...), where the thermal conductivity of the solid
    material only is specified. The rest is computed in the respective
    flux variables.

* Deprecated CLASSES/FILES, to be removed after 2.3:
  - The following headers in dumux/boxmodels/ have been deprecated and forward 
    to the corresponding headers in dumux/implicit/box: 
    boxassembler.hh, boxelementvolumevariables.hh, boxlocalresidual.hh,
    boxpropertydefaults.hh, boxelementboundarytypes.hh, boxfvelementgeometry.hh,
    boxproperties.hh, intersectiontovertexbc.hh

  - All headers in the following subdirectories of dumux/boxmodels have been 
    deprecated and forward to the headers in the corresponding subdirectories 
    of dumux/implicit:
    1p, 1p2c, 2p, 2p2c, 2p2cni, 2pdfm, 2pni, 
    3p3c, 3p3cni, co2, co2ni, mpnc, richards

  - Some box-specific classes "Box..." in dumux/boxmodels/common could be 
    completely replaced by unified "Implicit..." classes in 
    dumux/implicit/common: 
    ...DarcyFluxVariables, ...darcyfluxvariables.hh 
    ...ForchheimerFluxVariables, ...forchheimerfluxvariables.hh 
    ...LocalJacobian, ...localjacobian.hh
    ...Model, ...model.hh
    ...PorousMediaProblem, ...porousmediaproblem.hh
    ...Problem, ...problem.hh
    ...VolumeVariables, ...volumevariables.hh

  - The box-specific spatial parameter classes BoxSpatialParams... in 
    dumux/material/boxspatialparams....hh have been deprecated in favor of 
    ImplicitSpatialParams... in dumux/material/implicitspatialparams....hh.

  - The GridCreatorheaders from dumux/common have been moved to dumux/io: 
    cubegridcreator.hh, dgfgridcreator.hh, simplexgridcreator.hh

* Deprecated PROPERTY NAMES, to be removed after 2.3: BEWARE: The compiler will
  not print any warning if a deprecated property name is used.
  - CompositionFromFugacitiesSolver has been renamed to Constraintsolver.

* Deprecated public MEMBER VARIABLES, to be removed after 2.3: BEWARE: The
  compiler will not print any warning if a deprecated public member variable 
  is used.
  - numFAP and numSCV in Box(CC)FVElementGeometry have been renamed to 
    numFap and numScv, respectively.

* Deprecated MEMBER FUNCTIONS, to be removed after 2.3:
  - boundaryMatrixHeatFlux, markVertexRed and relativeErrorVertex 
    from ImplicitSpatialParams, ImplicitAssembler and ImplicitModel, 
    respectively. In favor of using 
    thermalConductivitySolid (see above), markDofRed and relativeErrorDof, 
    respectively. 

* DELETED classes/files, property names, constants/enums, 
  member functions, which have been deprecated in DuMuX 2.2:
  Everything listed as deprecated below has been removed.


Differences Between DuMuX 2.1 and DuMuX 2.2
===================================================

* IMPROVEMENTS and ENHANCEMENTS: 
  - Two new fully implicit models dedicated to simulate compositional
    (non-isothermal) CO2-brine systems have been added, together with 
    corresponding components and a fluid system. See test/boxmodels/co2(ni) 
    for details. These tests also illustrate the usage of element and vertex 
    parameters as well as boundary ids provided by DGF files for setting 
    permeability and porosity as well as boundary conditions.

  - Decoupled Models: An h-adaptive model using an MPFA L-method was added
    that simulates 2p and 2p2c flow on unstructured grids with hanging nodes 
    in two dimensions. See test/decoupled/2p(2c) for details.

  - All fully implicit porous media models are now capable of employing 
    the Forchheimer equation as an alternative to the commonly used 
    Darcy law. See test_forchheimer*p in test/boxmodels/mpnc for details. 

  - The Stokes models are now able to simulate the full Navier-Stokes 
    equations for momentum transport. See test/freeflow/navierstokes 
    for details.

  - The fully implicit models have been (partially) generalized to allow 
    for a cell-centered discretization in addition to the default 
    vertex-centered (box) one. Cell-centered fully implicit 2p and 2p2c 
    models are already available in the developers part of Dumux. Further 
    generalizations and the inclusion in the stable part are planned for 
    Dumux 2.3.

  - Several model-specific features and classes have been unified, like 
    the calculation of the Darcy velocity for the fully implicit flux 
    variables, or the temperature, gravity, and spatial parameter 
    functionalities of the fully implicit problems. Moreover, many
    names have been made more consistent. This includes the naming 
    and grouping of several parameters and corresponding properties, 
    the indexing of phases and components, and the preference of the 
    partial name "params" over "parameters." For details, see also the 
    deprecations listed below.
    
  - Added compiler support for GCC 4.7 and Clang 3.1.

* IMMEDIATE INTERFACE CHANGES not allowing a deprecation period:
  - From Dune 2.2 on, FieldVector::size is a method rather than an enum value.
    It is mandatory to add the flag --enable-fieldvector-size-is-method to the
    CONFIGURE_FLAGS. An example is given in the opts file dumux/debug.opts.
  - Implicit models: TwoPIndices, TwoPNIIndices, and RichardsIndices 
    additionally get TypeTag as template parameter. If the Indices are not 
    obtained via the property, this has to be adapted.

  - Implicit models: All model-specific computeFlux functions in 
    ...localresidual.hh have to get an additional bool parameter onBoundary, 
    which is by default set to false. If outflow conditions should 
    be properly implemented, also the constructor of the flux variables in 
    ...fluxvariables.hh has to get the additional argument and the 
    class has to be adapted to deal with boundary faces. See FS#117 and #99
    for details.
    
* Deprecated CLASSES/FILES, to be removed after 2.2:
  - Model specific base box problems: The common functionality has been 
    collected in PorousMediaBoxProblem in 
    dumux/boxmodels/common/porousmediaboxproblem.hh. The problem can be derived 
    from PorousMediaBoxProblem, instead of the model specific base problem: 
    OnePBoxProblem, dumux/boxmodels/1p/1pproblem.hh,
    OnePTwoCBoxProblem, dumux/boxmodels/1p2c/1p2cproblem.hh,
    TwoPProblem, dumux/boxmodels/2p/2pproblem.hh,
    TwoPNIProblem, dumux/boxmodels/2pni/2pniproblem.hh,
    TwoPTwoCProblem, dumux/boxmodels/2p2c/2p2cproblem.hh,
    TwoPTwoCNIProblem, dumux/boxmodels/2p2cni/2p2cniproblem.hh,
    ThreePThreeCProblem, dumux/boxmodels/3p3c/3p3cproblem.hh,
    ThreePThreeCNIProblem, dumux/boxmodels/3p3cni/3p3cniproblem.hh,
    MPNCProblem, dumux/boxmodels/mpnc/mpncproblem.hh.
    
  - All "...SpatialParameters" base classes have been replaced by 
    "...SpatialParams" classes:
    BoxSpatialParameters, dumux/material/spatialparameters/boxspatialparameters.hh,
    BoxSpatialParametersOneP, dumux/material/spatialparameters/boxspatialparameters1p.hh,
    FVSpatialParameters, dumux/material/spatialparameters/fvspatialparameters.hh,
    FVSpatialParametersOneP, dumux/material/spatialparameters/fvspatialparameters1p.hh.

  - Due to the unification of flux variables for the fully implicit models, 
    some model-specific flux variables have become obsolete: 
    OnePFluxVariables, dumux/boxmodels/1p/1pfluxvariables.hh,
    TwoPFluxVariables, dumux/boxmodels/2p/2pfluxvariables.hh,
    RichardsFluxVariables, dumux/boxmodels/richards/richardsfluxvariables.hh.

  - Two components have new names and locations in dumux/material/components: 
    SimpleDNAPL, simplednapl.hh -> DNAPL, napl.hh
    Oil, oil.hh -> LNAPL, lnapl.hh

  - Some MPFA-O method files/classes have been moved to a new subdirectory 
    "omethod" in dumux/decoupled/2p/diffusion/fvmpfa: 
    fvmpfaopressure2p.hh, fvmpfaovelocity2p.hh, fvmpfaopressureproperties2p.hh

  - DUMUX_UNUSED is deprecated and will be removed after 2.2. It should be 
    replaced by the upstream version DUNE_UNUSED.
  
  - DUMUX_DEPRECATED_MSG is deprecated and will be removed after 2.2. It should
    be replaced by the upstream version DUNE_DEPRECATED_MSG.

* Deprecated PROPERTY NAMES, to be removed after 2.2: BEWARE: The compiler will
  not print any warning if a deprecated property name is used. 
  - The "SpatialParameters" property has been renamed to "SpatialParams".
  
  - The model specific "...Indices" property has been renamed to "Indices".

* Deprecated CONSTANTS/ENUMS, to be removed after 2.2: BEWARE: The compiler will
  not print any warning if a deprecated constant/enum is used.
  - In the 2p2c/ni and 3p3c/ni models, all indices related to phase and 
    components can be pre/suffixed with "w", "n" and, 
    for three phases, with "g". 
    boxmodels/2p2c/...: "l", "g" pre/suffixes have been replaced by "w", "n".
    boxmodels/3p3c/...: "c", "a" pre/suffixes have been replaced by "n", "g".

* Deprecated MEMBER FUNCTIONS, to be removed after 2.2:
  - Spatial parameters: The spatialParameters member functions of the base 
    problems have been replaced by spatialParams: 
    dumux/boxmodels/common/porousmediaboxproblem.hh, 
    dumux/decoupled/1p/diffusion/diffusionproblem...hh,
    dumux/decoupled/2p/impes/impesproblem2p.hh,
    dumux/decoupled/2p/transport/transportproblem2p.hh.
  
  - Flux variables: Renaming of members 
    "...AtIP" -> "...", 
    "concentration..." -> "massFraction...",
    "molarConc..." -> "moleFraction..."
    The "massFraction..." members have been deprecated, instead 
    "moleFraction..." should be used.
    Affected files:
    dumux/boxmodels/1p2c/1p2cfluxvariables.hh, 
    dumux/boxmodels/2p2c/2p2cfluxvariables.hh,
    dumux/boxmodels/mpnc/.../...fluxvariables.hh,
    dumux/freeflow/stokes.../stokes...fluxvariables.hh.

  - Box models: The primaryVarWeight() functions are no longer used for the 
    evaluation of the relative error. 

  - Element and FVElementGeometry: The elem_() and fvElemGeom_() member function
    of BoxLocalResidual have been replaced by element_() and fvGeometry_(). 
    
  - Primary variables: All "...primaryVar/s" member functions have been replaced
    by "...priVar/s": 
    dumux/boxmodels/common/boxlocalresidual.hh, 
    dumux/boxmodels/common/boxvolumevariables.hh.

  - Start functionality in dumux/common/start.hh: printUsageDGF and 
    printUsageGrid are no longer needed.
  
* DELETED member functions, which have been deprecated in DuMuX 2.1: 
  - dumux/material/spatialparameters/boxspatialparameters1p.hh:
    extrusionFactorScv and extrusionFactorScvf, now part of the volume variables

  - dumux/material/idealgas.hh:
    concentration, replaced by molarDensity

  - dumux/material/fluidmatrixinteractions/2p/efftoabslaw.hh:
    pC(const Params &params, Scalar Sw, const Scalar temperature)

  - dumux/common/start.hh:
    startFromDGF, startWithGrid, startWithParameters, all replaced by start

  - dumux/common/spline.hh:
    set(const ScalarArray&, const ScalarArray&, Scalar, Scalar), replaced by setXYArrays,
    set(const PointArray&, Scalar, Scalar), replaced by setArrayOfPoints

  - dumux/common/variablelengthspline_.hh, dumux/common/fixedlengthspline_.hh:
    various set routines, replaced by more descriptive names

  - dumux/io/vtkmultiwriter.hh:
    VtkMultiWriter(const std::string&, std::string), replaced by VtkMultiWriter(const GridView&, ...),
    beginTimeStep, replaced by beginWrite,
    createField, replaced by allocateManagedBuffer,
    addVertexData, replaced by attachVertexData,
    addCellData, replaced by attachCellData,
    endTimeStep, replaced by endWrite

  - dumux/decoupled/2p2c/2p2cproblem.hh:
    IMPETProblem2P2C(const GridView&, bool) replaced by IMPETProblem2P2C(TimeManager&, ...),
    IMPETProblem2P2C(..., SpatialParameters&, ...) replaced by IMPETProblem2P2C(TimeManager&, ...),
    initSat(const GlobalPosition&, const Element&) replaced by initSat(const Element&)
    initConcentration(const GlobalPosition&, const Element&) replaced by initConcentration(const Element&)
    
  - DUMUX_DEPRECATED has been removed.


Notable Differences Between DuMuX 2.0 and DuMuX 2.1
===================================================

- The thermodynamics framework has been overhauled:
  - The programming interfaces for fluid systems, fluid states and
    components has been formalized and cleaned up.
  - Fluid systems now have the option to cache computationally
    expensive parameters if they are needed for several relations.
  - Fluid systems are not charged with the computation of the
    chemical equilibrium anymore.
  - Fluid states are now centralized infrastructure instead of being
    model-specific.
  - Constraint solvers (which simplify solving thermodynamic
    constraints) have been introduced.
- Outflow boundary conditions have been implemented for the
  fully-implicit models 1p2c, 2p2c(ni) and stokes(2cni).
- The problem and spatial parameter base classes also provide optional
  model-independent interfaces. These methods only get the position in
  global coordinates as argument and are named *AtPos()
  (e.g. boundaryTypesAtPos()). This allows an easy transfer of problem
  definitions between implicit and sequential models.
- The following fully-implicit models have been added:
  - 3p3c, 3p3cni: Isothermal and non-isothermal three-phase,
    three-component models for flow and transport in porous media
    based on primary variable switching.
  - MpNc: A model for arbitrary number of phases M > 0, and components
    (N >= M - 1 >= 1) for flow and transport in porous media. This
    model also comes with an energy and a molecular diffusion module.
  - stokes, stokes2c, stokes2cni: Models for the plain Stokes
    equation as well as isothermal and non-isothermal Stokes models
    for two-component fluids.
- The sequentially-coupled models have been overhauled:
  - A common structure for cell centered standard finite volume
    implementations has been introduced.
  - The data structures where overhauled to avoid large clumps of data
    in large-scale simulations: Each cell stores data in its own
    storage object.
  - The too large assemble() methods have been split into submethods
    getStorage(), getFlux() etc. By this, inheritance of classes has
    been improved and code duplication was reduced.
  - The conceptual seperation of the "VariableClass" (central
    infrastructure), data storage, transport model and pressure model
    has been improved.
  - More of infrastructure is now shared with the implicit models
    (e.g. the BoundaryTypes). This results in significant performance
    improvements and makes debugging easier.
- The 2padaptive sequentially coupled model has been added. This model
  implements a grid-adaptive finite volume scheme for immiscible
  two-phase flow in porous media on non-conforming quadrilateral
  grids.
- The dependencies for the external dune-pdelab and boost packages
  have been removed.
- The build system has received major improvements:
  - There is now much better test coverage of build-time dependencies
    on packages for the default autotools-based build system.
  - Experimental support for building DuMuX using CMake has been much
    improved. In the long run, CMake is projected to become the
    default build system.
- All headers can now be included without any preconditions.
- DuMuX now compiles without warnings if the -pedantic flag used for GCC.
- Specifying run-time parameters is now possible. The mechanism allows
  to use parameter files or to specify parameters directly on the
  command line and fallback parameter input files have been added for
  each test application.  As a consequence, applications can be run
  now without specifying any command line arguments.
- The DuMuX property system has been fine-tuned:
  - Encapsulating property names with the PTAG() is no longer required
    for the GET_PROP* macros (but is still allowed).
  - Setting property defaults has been deprecated.
  - All properties defined for a type tag can now be printed. Also,
    their value and the location in the source where they where
    specified is included in the output.
- Using quadruple precision math has been made possible for GCC 4.6 or newer:
  - To use it, the configure option '--enable-quad' needs to be added
    and the type of scalar values needs to be changed to 'quad'. This
    can be done in the problem file using

        SET_TYPE_PROP(YourProblemTypeTag, Scalar, quad);

    It should be noted, that performance is very poor when using
    quadruple precision arithmetic. This feature is primarily meant as
    a debugging tool to quickly check whether there are machine
    precision related convergence problems.