Fixed issue with terrain height level (y level on the x-y coordinate system) not properly being assigned and creating double-layers. Also fixed problem with "null terrain" being created and turned into a biome. Added biome balance to help regulate amount of each biome spawning.
Altered the image generation to now also generate terrain, however it is broken and has "red spots" where terrain fails to generate. Will look further into it and fix next time. Terrain regen also doesn't properly "blob" but has more of a tendency to form mesh-grids
