Updated CASTOR geometry to support to separated halves. This includes changes in the sector to volume numbering scheme in order match the original numbering.
Merge pull request #2722 from cbaus/updated-castor-geometry-seperated-halves

Sim -- Updated CASTOR geometry to support to separated halves
Merge remote branch 'origin/CMSSW_7_1_X' into CMSSW_7_0_X