Massive update of GeomSvc: added a Plane class; added a function to calculate the interception of track and plane
Bug fix in GeomSvc
Bug fix in GeomSvc; Implemented interception thing in FastTracklet::calcChisq
Minor rearrangement of GeomSvc hoping it will run faster
Bug fix in GeomSvc: re-calculate nVec for prop. tubes with correct averaged x0,y0,z0
Merge branch 'rot-x-y'