Fix and style conversation confirm screen
Remove old_start, end_conversation and tag acquisition from conversation wrapper. Also fix all the things that relied on those.
pep8/pyflakes cleanup.
Merge branch 'develop' into feature/issue-639-old-conversation-cleanup-pt-1

Conflicts:
	go/contacts/views.py
Change client side to use the csrf token cookie instead of taking it from the template
Merge branch 'develop' into feature/issue-639-old-conversation-cleanup-pt-1
Merge branch 'develop' into feature/issue-639-old-conversation-cleanup-pt-1

Conflicts:
	go/conversation/views.py
Use helpers instead of status constants.
Basic searchable table view components
Merge branch 'develop' into feature/issue-639-old-conversation-cleanup-pt-1
Change TableView to support async behaviour
Refactor RowView query parsing into a RowCollection (to reduce overhead)
Boilerplate for conversation group edit table view
A small bit of refactoring for RowView and TableView
Template rendering and event bindings for GroupRowView
Merge branch 'feature/issue-639-old-conversation-cleanup-pt-1' into develop
Add ConversationGroupsModel and make the necessary changes to fit it into place
Change server side EditConversationGroupsView to sync with the new ConversationGroupsModel on the client side
Remove delivery_tag and delivery_tag_pool fields from conversation model and fix/kill everything that looked at them.
Get TableView working for conversation edit groups screen