Switch to simple dropdown for language selection
Merge branch 'master' into language_dropdown

Conflicts:
	corehq/apps/users/forms.py
	corehq/apps/users/views/__init__.py
Switch language input to combobox
Give full list of languages if user has no project
Clean up language selection for users

It now provides some placeholder text and does not start with a language
selected so the expansion arrow is more obvious.
Merge pull request #258 from dimagi/language_dropdown

Language dropdown