Chunk generation now uses ChunkSnapshot versus Block array.
Fix for BiomePopulator restoring Biome population

Address exception caused by the built in Biome populators not liking a
chunk Y column with no blocks.
Enable biome decoration for all biomes

Goes directly to the BiomeBase class assigned to the given chunk versus
having CraftBukkit determine the Biome enum and then using Reflection to
try and convert it back.
Merge pull request #1 from Calyntral/master

SkylandPlus Fixes by Calyntral