(thoroughly reviewed by Philipp")


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- remove stray AC_MSG_RESULT from DUMUX_CHECK_QUAD
- slight reformulations of the usage message of test_2p
- replace tabulators with four spaces
- remove trailing whitespaceformating

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the reason why the boundary indices where a global array is because it
is possible that an element's vertex is on the boundary, but the
element does not have any boundary intersections. only checking for
boundary intersections does not work for dirichlet conditions on such
grids. (for simplex grids that case is actually quite common.)

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- new institute name
- add missing modelines
- reformat the entry for leopold stadler in air.hh

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counter-intuitively, ostringstream::clear() does not reset the string
it writes to. that can be done using ostringstream::str("")

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gridView.comm().sum(), min() and max() routines in sequential runs.
These can be avoided if the routines are only called if the number of
processes is greater than 1. I know that it would be better to find the
real source of the problem, but I did not succeed. If someone finds it,
I will be happy to revert this change. 


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mainly to get rid of AX_BOOST_BASE and to reduce the number of
dependencies.

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Implemented completeFluidState for 1p, 1p2c, richards. Moved convenience function to the base box model.

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This reverts commit a54b8148be089c853de0c06a49d90fb4db99e7fb.

(accidentally committed)

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allows to better decouple the problem from the model and will also
make the generic implementation of multiple spatial and temporal
discretizations _much_ easier.

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Scalar: CFLFactor, PreconditionerRelaxation, MobilityUpwindAlpha,
UpwindAlpha, UpwindWeight, MaximumDefect, RelaxationFactor,
LSResidualReduction
int: LSVerbosity, PreconditionerIterations, NumericDifferenceMethod,
IterationFlag, IterationNumber, LSMaxIterations, GMResRestart
bool: EnableGravity, EnableJacobianRecycling, EnablePartialReassemble,
EnableTimeStepRampUp, EnableHints 


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allows to update the relative weights of the primary variables based
on the values of the volume variables. this makes it possible to use
expensive criteria as weighting factors of the primary
variables. Currently, the only "real" user is the Mp-Nc model which
now defines the weight of the component fugacity as the minimum of the
fugacity coefficient times the phase pressure of any phase. the 2p2c
model would possibly benefit from a similar treatment, though...

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makes it slightly more readable but is exactly the same in any other respect.

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saves a few ugly lines in the box model (but adds a few slightly less
ugly ones to the BoxElementBoundaryTypes), a bit of memory and
improves performance a bit (for test_2p it was about 3%)

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the VTK writing code would probably benefit from some more invasive
refactoring in the medium-term future...

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this should not introduce any regressions and will hopefully change
things for the better...

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if jacobian recycling is disabled, then everything works as before (at
least for the 2p test problem). no tests have been conducted with it
being enabled, yet...

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using hints may dramatically speed up the expensive computations of
the volume variables if the calculations are expensive. This is due to
the fact that the initial guess for non-linear computation is usually
much closer to the result when using hints. (this mainly affects
calculation of the thermodynamic equilibrium when using non-linear
fluid systems.)

hints must be explicitly enabled by setting the "EnableHints" property
to true.

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only do a comm().sum, min, max operation if more than one process is involved. Removes mysterious bug if cmake build is used.

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this was made possible by the two-stage initialization approach introduced
half a year ago

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