Changed Oil Generation to use config file ID's for generation to support
integration with mods like Biomes O' Plenty
Enabled use of BiomeDictionary.Type to pass in addition to IDs of
biomes. Added error handling. Doesn't seem to print the warning to the
log correctly though, just prints a string as info it looks.
Forgot to trim ids.. Oops..
migrated to forge 60 and gradle 1.2