Voronoi and perlin implemented and working.  Better data structures are
in the process of being constructed to allow for boime assignment.
Biome assignment mostly working. flood fill of ocean is broken. Saving
progress before overhauling ocean-fill
Flood fill is working. code is still pretty messy though.
Biome assignment totally working.
Cleanup of old commented-out code and outdated variables.
merging Island branch into master