Post detail changes:

* Fixed #258
* Removed webView code that doesn’t work on KitKat
* Decreased margin between title & content
Post detail now prefixes video embeds with http: if they start with //
code cleanup
First pass at immersive post detail on KitKat
Removed post list row animation, except when changing tags or loading new posts - #268
Fixed #274 by removing script blocks in comments
Comment box on post detail is now one line tall, auto-expands to four lines while user types
1st pass at unified comment detail (not integrated yet)
2nd pass at unified comment detail (minor integration)
3rd pass at unified comment detail - replies & moderation now work
4th pass at unified comment detail - removed CommentFragment and replaced it with CommentDetailFragment
Added animated message bar to comment detail
Improved animation when approving a comment
Moved message bar to separate include layout, added MessageBarUtils
Refactored existing comment code
Comment moderation and reply now uses REST rather than XMLRPC
1st pass at showing comment detail from notification
Comment box layout now has its own progress bar
Code cleanup related to comments, better integration between comment detail & notification list
Merge branch 'develop' into feature/native-reader