Listen to BAG_UPDATE_DELAYED instead of BAG_UPDATE.

BAG_UPDATE_DELAYED is fired once every other BAG_UPDATE have been fired.
Ignore items with cooldown longer than 2 secondes.
Add Ever-Blooming Frond (90% health, 90% mana).
Merge branches 'ever-blooming-frond' and 'bag-update-delay'

Conflicts:
	Buffet.lua