deleted un-needed vis stuff
added a file where all the NIST variables will go to added.  

This should be the only place they are added.  This makes the Detector
construction a cleaner file and makes it easier to see what materials
are defined.  Over all will bring smiles.
Added these files - they do some magic to sensitive detector will
comment later if and when I know what they do
made some changes so that sensitive detectors will work
made small changes.  can't remember what all though
add a dummy senstive detector - just to get ROOT stuff going and to test
code
add a material - a sintillator - just a testing one.  It has no real
significance
made small changes