Move UserProfile and Registration out of courseware and into a renamed auth (now user)

--HG--
rename : auth/__init__.py => user/__init__.py
rename : auth/tests.py => user/tests.py
rename : auth/views.py => user/views.py

courseware/content_parser.py

@@ -7,7 +7,7 @@ from mako.lookup import TemplateLookup
 
 try: # This lets us do __name__ == ='__main__'
     from django.conf import settings
-    from models import UserProfile
+    from user.models import UserProfile
 except: 
     settings = None