Merge pull request #292 from rosscdh/lp

Requirements update.
Fixed bugs with class based message views

    extra_context wasn't being added to template context
    renamed context_object_name to message_list
add message signal to umessage
Merge pull request #297 from kevinslin/master

Fixed some bugs with umessage class based views
Merge branch 'lp' of github.com:rosscdh/django-userena