Vertically Stacked Dimensions

Changes:

• fixed #2 portals not synchronizing properly when force generating chunk on the other side
• fixed a crash after switching single-player worlds
• made dimension stack and world generation settings persistent with world save (so changes in config won't affect already generated worlds)
• made bedrock replacement also support replacement of other blocks than bredrock
• fixed nether worldgen not working if mods inject their own ChunkProvider
• added "even", "centered" and "gaussian" distribution modes for custom ore generation
• added ore generation for common modded ores in default config

Dependencies:

• for MC-1.12.2
• forge-14.23.0.2512 (or newer)
• CD4017BE_lib-6.3.1