Applying New Geodes

• Added Gabbro
• Added Certus Quartz Geodes (Requires AE2 - optional) (by Nerjal Nosk #29)
• Certus Quartz Geodes will only generate if AE2 is installed AND they are enabled in the config.
• Certus Quartz Geodes generate with an outer layer of Gabbro
• Gabbro is a new Igneous Rock material that will be used in all future instances for Geodes that use materials from other mods, like Certus Quartz Geodes, in order to help signify that the Geode is added by this mod and not the original mod
• Gabbro can still be obtained without AE2 by crafting together Diorite with Basalt