Added support for sub-bending add-on abilities. (and other stuff...)

- Added subBending boolean method to be implemented in add-ons.
- Added subBending color to water's Ice moves, and Bloodbending.
- Modified the AbilityModuleManager to support add-on subBending
abilities for Water, Earth, and Fire.
- Added Config entries for the sub-bendings Chat Colors.
- Added helpful subBending check methods in Methods.java
- Added my IGN to the /b w message conditions for PK (Core) developer.