Incarnation: Tree of Life Support

[Twintop]

Add support for Incarnation: Tree of Life and related talents. Specific requests from Husky:

• [x] Bar color change when Tree is active, bar color when about to expire, and configuration + bar text (as seen everywhere else with this sort of behavior)
• [x] If you are talented in to Cenarius' Guidance, have Tree's color changes take precedence over Clearcasting procs.
• [x] Bar text for Reforestation stacks