Merge pull request #49 from alecgorge/master

Improvements to avatar default, user scrolling, add subtitle support
update ignore. use asset catalog in Xcode5.
Merge branch 'master' of https://github.com/jessesquires/MessagesTableViewController
remove duplicate images. optmize all PNGs.
cleanup and refactoring. update comment headers. break up categories. prefix categories to avoid naming collisions
more refactoring and clean up
add JSMessageTextView
cleanup and refactoring
fix import
commit
refactoring
tweak image drawing
refactor bubble message cell. fix layout bugs. new policies. refactor delegate and datasource methods.
refactoring.
refactoring
added support for custom avatar image views
refactor to avatarImageView data source method only.
avatar images
refactoring
fix avatars. update demo to simulate group chat