Merge pull request #12 from MikeMillerGIS/master

minor updates
Geometry Classes accept arcpy.Geometry objects

Added support of arcpy.Geometry() objects to be passed to Geometry type
classes.
clean up
Merge https://github.com/Esri/agol-helper

Conflicts:
	source/agol/common.py
	source/agol/layer.py
updated gitignore