Add enderchest and anvil to blacklist inventories.
Workaround for CraftBukkit bug with slab placement
Wither skulls should be handled separately from fireballs
Apply a cap to the health and hunger flags to prevent possible exceptions

If a player's health or hunger is set to higher than its respective maximum CraftBukkit will throw exceptions.
Don't cancel explosion if we only want to clear blocklist. May potentially cause issues with multiple settings overlapping.
Check the block that the item frame will end in, not the block the player clicked.