Few tiny modifications:
1) added doc/run file for easier processing of the musrSim.tex file
2) updated documentation (musrSim.pdf)
3) removed one of two definitions of "lightblue" in musrDetectorConstruction.cc
4) added the volume "G4Para" in musrDetectorConstruction.cc
5) corrected small bug for "2DBOperaXY" type of field in musrTabulatedElementField.cc
