Add comments and posts with @ mention
Merge https://github.com/mrudu/mastercodebase into mrudu

Conflicts:
	authentication/views.py
	inu/media/js/post.js
	inu/media/js/post.js~
	inu/media/js/tag-it.js
	inu/media/js/tag-it.js~
	inu/settings.py~
	inu/templates/includes/left-nav-list.html
	inu/templates/messages/base.html
	inu/templates/messages/compose.html
	inu/templates/messages/inbox.html
	inu/templates/messages/new_message.html
	inu/templates/messages/view.html
	inu/templates/pages/post.html
	inu/templates/pages/profile.html
	inu/urls.py
	inu/urls.py~
	profiles/models.py
	profiles/models.py~
	profiles/views.py
	profiles/views.py~
Post and tagging working
Add comment feature