1.5.3 Attack of the Killer Shrubs!

Shambler added.
Fixed a super high growth rate for all mobs, I hope this wasn't in a
release as it was meant for testing!
Added Potion Effects ID override and a way to completely disable them if
needed.
Fixed Dungeon Spawner Weights and added Global Dungeon Spawner Weight
Scale.
Fixed Cinders spawning in solid blocks.