ion.cc: added minimum ion/fg energy option. Added hit energy list
option. Changed ionBase::type method to assign ion->type (FF, LAT, or
FG). Cleaned up reset method. Fixed prep_FF bug.

material.cc: general cleanup.

mytrim_bub: changed hitFile to energies of each hit. Changed
determination of ion type from tag to type.

sample/sample_cluster.cc: general cleanup

simconf: added minimum ion/fg energy variable.

trim: added support for hit energy list, and type assignment. Moved
decision if to keep recoil from header to the trim loop.