Renamed many files.  Attempted to get multithreading to work (it doesn't right now). Implemented the NpolHit::Draw() method. Copied and modified Geant4 example B1's .mac files.  Most of the changes were done to model example B1.
messed up the 'git add's on the last commit.
Merge pull request #2 from dwilbern/master

Broken multithreading changes