Added maxCanSpawnInChunk event to allow overriding of creature chunk spawn cap
Clarify Factory call and Event Functionality
Updated FML: MinecraftForge/FML@570faeb790745c35403c67fabab57651b71da576 Added the ability to save transformed classes to disc for debugging.
Add checking for 'ENUM$VALUES' in EnumHelper. Eclipse uses it's own internal compiler which does not follow the java standard of making the values field names $VALUES and private. Instead its public and ENUM$VALUES. Closes #502
Deprecate IArmorTextureProvider, moved to Item. And exposed more information to the function. Closes #365
Pulled Biome Tag System by Emasher, Closes #433
An issue with biome adding mods which is becoming increasingly annoying for players, is that many mod authors that add biome specific world generation or mobs in their mods, for the most part, hard code them to work with vanilla biomes only. This becomes a huge problem when it's difficult to even find a vanilla biome, let alone a specific one, when biome mods are installed.

A simple solution to this problem is a tag system for biomes that allows mod authors to set up their world generators, or mobs to generate or spawn in biomes that have been registered with a specific tag such as "FOREST", or "FROZEN". I wrote such a system a few months ago, which I've been using with my own mods, and have made available to anyone who wants to use it. Since then, I've had requests from mod authors and players alike to try and get it, or at least similar functionality, into Forge, where other mod authors will be more comfortable using it.

Aside from the tags, it also includes a rule based system to classify biomes that have not already been registered with it when information is requested on them (You can opt out of this by registering a biome as type "NULL"). And additionally, the ability to register IWorldGenerators for specific biomes, or biome types (tags) to speed up chunk generation a little bit.
Add function to remove categories from a configuration, indavidual properties can be removed using ConfigCategory.remove() Closes #462
Merge pull request #467 from Crudedragos/maxSpawnEvent

Add Event to Tweak max creature spawn in chunk during spawning