added cx_Freeze script for Mac OSX
improved check-for-frozen, esp for Mac/cx_Freeze
using numpy instead of cmath
fix bug passing gsexrmfile between mapviewer and xrfdisplay
fix bug passing gsexrmfile between mapviewer and xrfdisplay
updated MapViewer launcher to use larch.use_plugin_path()
Merge branch 'master' of github.com:xraypy/xraylarch