Added Stance Changing to Companion Behavior

-Press RB+LB or O+P to rotate through stances
-for testing/demo purposes color change to show stance
-added list of abilities and function to add abilities to behavior
-call change_stance on each ability when stance is changed
-call stance_delegate() on abilities when their cooldown equals 0, then
set cooldown based on return value
-remove tag to avoid conflict?
Merge pull request #13 from jpmeenagh/Johns-5-CompanionAI

Added Stance Changing to Companion Behavior