The pvt interface is extended to handle wet-gas systems:
1. rvSat is added as a function in the PVT interface
2. SinglePvtLiveGas computes the pvt values and its derivatives
3. The old rbub variable is changed to rsSat for clearity
4. The new interface is tested in test_blackoilfluid with data from
liveoil.DATA and wetgas.DATA
on CLang 3.4 svn this produced
```
/home/erne/src/opm-core/opm/core/pressure/fsh.h:20:9: warning: 'OPM_FSH_HEADER_INCLUDED' is used as a
header guard here, followed by #define of a different macro [-Wheader-guard]
```
which is correct...
this simplifies the template meta programming a bit. (Which does not
mean that it suddenly gets easy.) The main motivation for this work is
to make the splices feature work properly which allows eWoms to
properly select the spatial discretization at any point.
Further, the number of type tags a node can inherit from now is truely
unlimited thanks the the generic tuple reversal class provided by
https://sydius.me/2011/07/reverse-tuple-in-c/ . (before, the maximum
number of nodes from which a type tag could inherit was 11, so this
limitation did not really matter in practice.)
This code is run unconditionally each time we do a reconfigure; if the
option is added at each time, they will accumulate (needlessly) on the
command-line, making it harder to inspect the log.
If the module root is not explicitly specified, the loading of its
configuration is delegated to a find module, which does a heuristic
search in known/surrounding directories. Most OPM modules use the
common logic in OpmPackage; this patch configures the search
specifically for opm-autodiff.
If we have checked out a newer Eigen3 directory in a sibling directory
to ours, assume that this is because the system version is obsolete and
that we want to use this one instead.
Eigen3 is a template-library, so we must compile the source code
directly together with ours instead of linking to a library.
If the build script gives us the location of a "built" Eigen3,
meaning a directory in which CMake has been run, locate the true
source directory from the cache entries.
Commit a5a4d7b introduced density and viscosity evaluators into the
SinglePvtInterface that accepted an externally assignable condition
to distinguish saturated from unsaturated cases. As a result of a
few low-level technical problems with that approach, this commit
changes those affected interfaces to use the black-oil specific
'PhasePresence' facility of commit a033329 instead.
Update tests and callers accordingly.
Suggested by: @andlaus
Approved by: @atgeirr
