Faster leader actions and more avatar buffs

Reduced global cooldown for leader actions from 5 to 2 seconds.
Replaced the cooldown bonus of 'Frenzy' Avatar upgrade with a +1 increase in number of targets hit by leader abilities per level.
Increased the damage multiplier for 'Bloodlust' Avatar upgrade from 25% to 50% per level to make it more competitive with other upgrades.
Only darken the pending leader ability that is waiting on player to select destination, rather than the entire leader bar.
Updated version to 2.2.2.9.