Begin Metalbending

If you land on a metal block and you have metalbending permissions, you
will not take fall damage.
Give Metalbending its own color

This color is configurable (Defaults: Dark Green). Will display
abilities in /bending display and their descriptions in this color if
they are metalbending abilities.
Add isMetalbendingAbility() to AbilityModule

Return true if custom ability is a metalbending ability.
Added Extraction

First complete Metalbending ability. Allows metalbenders to extract ores
from stone. (The stone wont revert, preventing dupes). Has a small
chance of doubling or tripling the loot.