Revert "Fissure generation moved to initial chunkgen instead of the post generation GameRegistry. Seems to have provided some speed gains here but needs testing on other rigs for confirmation."

This reverts commit dd43a787dc33c2a687d0b03b683efc46ffc867be.

Conflicts:
	TFC_Shared/src/TFC/TerraFirmaCraft.java
	TFC_Shared/src/TFC/WorldGen/TFCChunkProviderGenerate.java