Added more descriptive comments
Added more descriptive comments

git-svn-id: http://svn.code.sf.net/p/petavision/code/sandbox@6998 7c0444ca-5550-0410-9008-faecdbe78eb5

Former-commit-id: 73908d40d2e643607569c049b9060ccc7420b449
PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV