Remove mekanism processing materials from oreDict

(only the 3x/4x ones)
Allow disabling certain Extruder reecipes.
Merge pull request #77 from Johannes13/GT_Extruder

Allow disabling certain Extruder recipes.
Move to WORLD_LOAD as it was refactored in RTC
Comment out CCTweaks, fix compile error in GTTweaks.
Don't unregister Mek stuff. Valid Oredict Entries are needed to remove them from the GT Extruder.

Revert "Remove mekanism processing materials from oreDict"

This reverts commit bf3bfbed11227686991c2d3d1a50a70565c9fe2b.