[TIMOB-15450] Refactor setTitle method
[TIMOB-15450] Support navTintColor on TabGroup
[TIMOB-15450] Expose titleAttributs and translucent for TabGroup
[TIMOB-15450] Doc Update
Merge branch 'master' of git://github.com/appcelerator/titanium_mobile into timob-15450
[TIMOB-15450] Ensure properties are replaced
Merge pull request #5664 from vishalduggal/timob-15450

[TIMOB-15450] iOS: More customizations for the tabGroup