re-arrange the structure of the codes for adding a first version of the Muon...
re-arrange the structure of the codes for adding a first version of the Muon Det geometry to CRD, not ready to be used, waitng for Zibing to implement
re-arrange the structure of the codes for adding a first version of the Muon Det geometry to CRD, not ready to be used, waitng for Zibing to implement