See 9b50841c

Include plumed- in the fork name

Knowing which PLUMED version has patched GROMACS is potentially valuable information for GROMACS and PLUMED users and developers troubleshooting their runs.

plumed-patch is the script-only version used when cross compiling

See 074ce219

See #737

See #737

the energy was not correctly updated if the move was accepted

- matheval not needed
- fftw is already on by default

I tested by changing --print-prog-name to --print-prog-namex (not existing) so as to reproduce
the bug, and this seems to fix it so I merge it.

See #726