Incorporate g1wr and normlwr into fluka_funcs.cpp
incorporate g1wr and nrmlwr into fluka_funcs; also add some cmake capability
Remove obsolete files and commented-out code; create separate main file for readvol; fix cmake to create readvol and mainfludag targets.
Add mainfludag build to cmake system; set testing directory to sample files
Ignore cmake-generated Makefile