Refactors PostsController and adds unit tests.
Add Save button to top of user preferences
Rollback faraday gem to fix conflicts
If flagging a topic with only one post, flag the post instead
FIX: Update onebox gem to bring back wordpress oneboxing
Include members count on groups page.
Merge pull request #1972 from verg/user_pref_save_btn

Add Save button to top of user preferences
Merge pull request #1971 from velesin/posts_controller_refactoring

Refactors PostsController and adds unit tests.
Use lower case group names in URLs
Suppress search in topic unless we have more than 10 posts
(configurable in site setting)
Show login button on 404 page. Add routes to show login and signup modals when page/route loads. If logged in and showing 404 page, load ember app.