cpw/FML — pull request #29 by ScottKillen (2012-06-17 03:35:10+00:00)
Title: Fixed WorldType to allow custom WorldTypes

**Client**
* Fixed WorldType to allow custom WorldTypes in world creation GUI.
* Deprecated client WorldType.getSeaLevel() and renamed it with the more accurate name of getMinimumSpawnHeight.
-*Changed related reference WorldProvider.

**Server**
* Fixed WorldType to allow custom WorldTypes
* Added methods to WorldType giving it the exact abilities of client WorldType
* Adjusted WorldProvider so that it relies on WorldType the same way it does on client.