added a GUID to Layers
added a GUID to Layers

BIDData/BIDMach,BIDData/BIDMach,BIDData/BIDMach,BIDData/BIDMach,jamesjia94/BIDMach,jamesjia94/BIDMach,jamesjia94/BIDMach,jamesjia94/BIDMach,BIDData/BIDMach,jamesjia94/BIDMach,BIDData/BIDMach,jamesjia94/BIDMach