Adapted values to 5th edition of "Properties of liquids..." and corrected error in accentric factor of nitrogen

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@5257 2fb0f335-1f38-0410-981e-8018bf24f1b0

due to an incorrect regular expression, this removed trailing "+"
signs instead of white space.

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continued)

added an overloaded update function to boxelementvolumevariables.hh to
allow the solution vector to be passed to the function


git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@4387 2fb0f335-1f38-0410-981e-8018bf24f1b0

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@4337 2fb0f335-1f38-0410-981e-8018bf24f1b0

- make all headers in dumux/common and dumux/boxmodels/common self sustained,
  i.e. that they can be included without any preconditions
- remove most irrelevant includes in the common code
- bring the 1p and 1p2c box model up to stable standard (accessor functions in
  the volume and flux variable classes, make the 1p2c model work for
  compressible fluids, various fixes the 1p2c test problem)
- change the isfluid-trail fluid system to standard SI units
- play around with timestep control if timestep ramp-up is enabled
  (problem is still not solved, though)
- split the *properties.hh headers into the declaration of the properties and
  definition of defaults for the common part of the box models as well as for
  the 1p and 1p2c models
- put the indices structure for the 1p and 1p2c models into separate files
- introduce a base class for volume variables of the box models

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everything in dumux stable compiles except 1p2c and richards since the old material system is used there

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@3837 2fb0f335-1f38-0410-981e-8018bf24f1b0