adds rabl for creating an api for nerdnews
merges with arash mousavi's pull request
--amend
Merge remote-tracking branch 'upstream/master' into development

Conflicts:
	Gemfile.lock
bug #39, user can undo/remove a tag from favorites
lets just see the dots in rspec and forget the messy terminal
add pry-nav for debugging
cpatcha should be visible on preview, Bug #28
Atom feed to show source url, bug #37