Add more comments and clean up SiTrackerSpacePointFinder.h/.cxx (ATLIDTRKCP-222)
Add more comments, follow Doxygen comment style, clean up the codes. (SiTrackerSpacePointFinder.h/cxx)
https://its.cern.ch/jira/browse/ATLIDTRKCP-222
RunTier0Tests.py was fine. RunTier0Tests.log