Wrap hypre includes in ifdefs so that we can compile without hypre
Remove deprecated variable from Makefile.am s

INCLUDES is deprecated in automake and displays a warning since automake
version 1.13. Replace uses of INCLUDE by AM_CPPFLAGS as recommended by the
warning message.
Use python3 everywhere
Remove floating point error checks because hlib has them all the time

Not good to remove but the results appear to be correct.
Remove git version header: makes build too complex + was never used
Add cli option for using predictor as initial guess