since SimulatorFullyImplicitCompressiblePolymer is now a template, the
opaque pointer stuff is also removed and the contents of the .cpp file
basically became _impl.hpp. for SimulatorFullyImplicitBlackoilPolymer,
the opaque pointer stuff was removed for the same reasons as for
SimulatorFullyImplicitBlackoil.
the actual unification of code is not yet done, but this patch points
out the direction of where this will go.
Also note that some synchronization with the ordinary blackoil
simulator (FLOW) was necessary to make it compile.
Finnally, the parser currently likes to throw an exception (also for
the opm-polymer master) when eating the opm-data polymer test
case. This prevented me from properly testing this patch:
```
and@heuristix:~/src/opm-polymer|simplify_simulator > ./bin/flow_polymer deck_filename=/home/and/src/opm-data/polymer_test_suit/simple2D/2D_THREEPHASE_POLY_HETER.DATA
================ Test program for fully implicit three-phase black-oil flow ===============
--------------- Reading parameters ---------------
deck_filename found at /, value is /home/and/src/opm-data/polymer_test_suit/simple2D/2D_THREEPHASE_POLY_HETER.DATA
output not found. Using default value 'true'.
output_dir not found. Using default value 'output'.
Program threw an exception: IOConfig: Reading GRIDFILE keyword from GRID section: Output of GRID file is not supported
terminate called after throwing an instance of 'std::runtime_error'
what(): IOConfig: Reading GRIDFILE keyword from GRID section: Output of GRID file is not supported
Aborted
```
