[TIMOB-14586] Add Text Style constants to UIModule
[TIMOB-14586] Avoid crash on iOS6
[TIMOB-14586] Code refactor for font method
[TIMOB-14586] Bug Fix
[TIMOB-14586] Add Heavy as keyword for bold indicator
[TIMOB-14586] Bug Fix
[TIMOB-14586] Doc Update
Merge branch 'master' of git://github.com/appcelerator/titanium_mobile into timob-14586
[TIMOB-14586] Update Docs
[TIMOB-14586] Address comments
[TIMOB-14586] Address comments
Merge pull request #4736 from vishalduggal/timob-14586

[TIMOB-14586] Support textStyles introduced in iOS7