Added a color helper

Added a helper for the 16 common minecraft colors. This way i could
avoid using the color RGB array from EntitySheep for returning the
colors of an item with certain damage.
Changed recipes in the custom crafting class
Added a rotation helper

Added a rotation helper class that can return the angle between two
object from their x and z coordinates, it can also change radians to
degrees and the other way around
Removed some test rendering

Removed test rendering from the alchemical workbenchs tesr.