Initial Commit

Initial Commit of the range simulation.  This code was copied from
G4/RangeSim on the necluster
Added the NIST Data

Added the NIST data that is used for comparison to the simulation
results in the analaysis.
Improved README

Update the README to have build instructions and a little bit about what
is contained in the project.  The .gitignore was also updated to ignore
the tmp, bin, and queue output files.