RMCProfile interface - output files from FastGR as input files into RMCProfile

[marshallmcdonnell]

Will give user initial input files to start a reverse Monte Carlo modeling analysis in RMCProfile.

Will need fields in FastGR for:
1) supercell dimensions
2) an input GSAS file
3) an input CIF file
4) additional options - polyhedral constraints, bond distance constraints, etc.

Would probably output a RMC directory with all files inside to launch RMCProfile from.