Dimensional Control Tweaks

This mod contains a few mixins for Dimensional Control to fix some bugs and improve performance.
Requires Dimensional Control:
https://www.curseforge.com/minecraft/mc-mods/dimensional-control

Changes:
Fix - The second layer in a GenLayerCombine did not get its seed initialized, resulting in it generating the same regardless of world seed.
Fix - GenLayerEdge would stop checking further data when the minimum bordering biome condition was met, regardless of if the chance parameter prevented it from replacing the biome.
Performance - GenLayerCombine and GenLayerEdge now use hashmaps to store and get combinations instead of looping over all combinations, substantially increasing performance for large data sets.