CLang and recent GCC warn about the "typedef" 'OneColInt' in
AutoDiffHelpers.hpp being unused. Similarly, GCC warns about unused
parameters in various place at level "-Wunused". This change-set
either removes ('OneColInt') or suppresses those messages.
There is some code in place now to create wells for the no-deck case,
but since it does not work correctly yet, the simulator intercepts this
and throws.
Namely well_state.perfRates() and well_state.perfPress().
In the process, some overloads of fluid methods were added to
take V arrays instead of ADB arrays.
Simultaneously, coarsened tolerances a bit. Still hardcoded, though.