Updating python functions for Arc geoprocessing

 Changes to be committed:
	modified:   FUNage.py
	modified:   FUNgentools.py
	modified:   FUNlogistics.py
	modified:   FUNnibblerast.py
	modified:   FUNpolytoraster.py
	new file:   FUNvegsuitability.py
	modified:   startup_arcpy_commands.py