Show categories as a radio list with popovers
Move CategoryForm to base/forms.py
Hook up category help in Map metadata form
Hook up category_help in documents
fix profile api
Merge pull request #1533 from jj0hns0n/category_help

Category help
Merge branch 'master' of https://github.com/GeoNode/geonode into guardian

Conflicts:
	geonode/maps/views.py
fix autocomplete for profiles