[TIMOB-14936] Allow setting tintColor on tabBar
Let developers specify rendering mode of icon/activeIcon
[TIMOB-14936] Bug Fix
[TIMOB-14936] Code Refactor
[TIMOB-14936] Code Refactor
Do not add as childView controller on IOS7
Merge pull request #4613 from vishalduggal/timob-14936-31X

[TIMOB-14936][TIMOB-14937](3_1_X) Backports