LigFlow/ScoreFlow search for ChemBase parametrized molecules

[diegoenry]

LigFlow/ScoreFlow should first search for a compound in ChemBase for parameters instead of recomputing all over again.

This is especially important for am1-bcc and even more for RESP which take a lot of time.

Another highlight here if to prevent recomputing the same parameters for the SAME molecule, in case a user wants to MMGBSA rescore multiple docking conformations.