ColorExtractor gets texture dir as arguement

ColorExtractor gets the base directory of textures to analyse as third
command line arguement.
Removed some unnecessary stuff...
Added biome colors

Biome colors are loaded from biome-colors.txt
block-colors.txt changed to have an optional biome_<colortype> tag as
third entry.
ColorExtractor and block-color-instructions.txt updated
Swamp colors and vines fixed

Manually edited swamp colors to match ingame color
Fixed vines not using biome color
Swamp biome colors and vines fixed

Manually edited swamp colors to match ingame color
Fixed vines not using biome color
Merge branch 'master' of https://github.com/UltraPeeks/TMCMR
Added biome-map option

The biome-colors file can be specified via command line
Merge pull request #9 from UltraPeeks/master

Merge change to support biome colors from UltraPeeks.