[TIMOB-15414] titleTextAttributes exposed via titleAttributes property
[TIMOB-15414] Don't set title for rootController in Tab
[TIMOB-15414] Set proper default values
[TIMOB-15521] Add support for shadowColor and shadowOffset on button
[TIMOB-15521] Address Comments
Merge pull request #4801 from vishalduggal/timob-15414

[TIMOB-15414] iOS: Allow users to customize title