Added directory for detector descriptors
added interface for geometry classes
Added Path3D arguments to getLayerHits() and getHits().
Created CLASFTOFDetector which implements CLASDetectorGeometry.
Removed erroneous comments.
Changed the way sector faces are calculated.
Created CLASECDectector to simulate the geometry of the CLAS electron calorimeters (copied from org.jlab.detector.ftof.CLASFtOFDetector.java).
adding changes, moving wrapper to dc in detector folder