[DEV-1152] Replace manually-added methods with call to getattr.
[DEV-1152] Move AskbotUser into separate askbot_user.py.
[DEV-1152] Add askbot_user.py to contain custom AskbotUser model.
[DEV-1152] Add post_save signal handler to create new AskbotUsers automatically.
[DEV-1152] Initial attempt at alterting imports through Askbot to use new AskbotUser model.
[DEV-1152] Attempt to add AskbotUser to list of models.
[DEV-1152] Resolve circular imports in models package.
[DEV-1152] Add related_name to AskbotUser one-to-one with User.
[DEV-1152] Alter createsuperuser to not refer to User, but self.UserModel (Askbot bug). Alter createsuperuser to incoporate new AskbotUser model.
[DEV-1152] Alter import of AskbotUser in models __init__ to all declaration in __all__.
[DEV-1152] Fix AskbotUser import in forms.py.
[DEV-1152] Add skeleton of custom manager class to askbot_user.