Fast Noise

New:

• new chunk cache
• only apply surface optimisation when no special chunk rules are present = skip heightmap updates if they are not going to be updated
• defer block counting
• reduce isFluid checks
• reduce palette index
• use direct bit manipulation to update block states in surface builder
• simplify surface builder loop
• skip updating chunks

Fixes:

• Wrong chunk generation when chunks are unloaded b/w stages (only applicable to c2me-ocl)
• fix possible wrong chunkgen in eroded badlands