Multilight: Move back to TileEntity based lights
AdditionalRecipes: Remove 4x string to 1x wool

The recipe exists in vanilla Minecraft now. Also allow any colour wool to be converted to 4x string.
Multilight: RGB light colours

No-longer limited to 16 colours, can mix 0-255 RGB for 16,777,216 unique light colours.

Gui slider code taken from iChun and modified as needed.