use render() instead of render_to_response() everywhere
minor code cleanups
remove create_user script. use the UI, createsuperuser or the django shell instead.
fix the userprofile migration. should not break if this migration was already executed somewhere.
make email and login_key field unique. fixes #439
silence a django 1.7 warning
Merge pull request #442 from karyon/render_createuser_unique

Render createuser unique