Updated portal IdentityFactory and FeedFactory along with the view controllers.
Updated FeedFactory and FeedController
Changed the names of zcFeed and zcIdentity
Add comment deletion functionality.
Moved commenting functionality to separate module
Added like and unlike functionality to posts.
Finished load more posts feature and error popups for feed on the client.
Merge pull request #22 from jdpagley/master

Put all the final touches on main feed.