Merge branch 'feature/arjun/new-discussions' of github.com:MITx/mitx into feature/arjun/new-discussions

query the comment service to get their results rather than filtering threads that have
already been loaded.

Merge branch 'feature/arjun/new-discussions' of github.com:MITx/mitx into feature/arjun/new-discussions

Allow students to delete threads / respones; prepare for edit view for response comments (but not complete)

Merge branch 'feature/arjun/new-discussions' of github.com:MITx/mitx into feature/arjun/new-discussions

work without modification. Eventually we'll want to switch the pagination there to
match the pagination on the main forum though.

Should rework how inline threads are expanded/collapsed a little so that this kind of
thing is not needed.

Currently there's a bug where editing more than once without reloading the page
causes it to successively get more and more broken.

use subviews for rendering. Functionality should be the same. Changed a few things
in DiscussionThreadView to make this a little easier.

Fix staff markers for inline threads and double staff markers for threads with deeply nested comments.

Extra spaces actually get added to a post when activating a WMD editor which can
get saved into the post if you click update.

Merge branch 'feature/arjun/new-discussions' of github.com:MITx/mitx into feature/arjun/new-discussions

Conflicts:
	lms/djangoapps/django_comment_client/forum/views.py
	lms/static/sass/_discussion.scss

loaded into the page in a data attribute instead of loaded on request via ajax.
The user profile page also does not provide facilities for adding
comments/responses, which I think would clutter the page too much.

Also removed some unused stuff from views.py.