Tinkers' Construct support

[Testure]

Adds support for:

• Drying rack
• Casting table
• Casting basin
• Smeltery melting (including entity melting)
• Smeltery alloying
• Creation of material traits
• Creation and removal of materials
• Tinkers Complement's high oven
• Tinkers Complement's melter
• Construct's Armory
• Bracket handlers for materials and traits

Construct's Armory armor can be added with the same material builder as tools.
Armor specific traits can be created by using the mods.tconstruct.Armory package which is only initialized when Construct's Armory is loaded.

Things that should be reviewed:

• Adding materials/traits requires a custom loader that runs during FMLPreInitialization.
• Initializing the traits of a material has to be done during FMLInitialization.
• A temporary fix for an issue causing Loader.instance().activeModContainer() to return null has been implemented into GroovyScriptSandbox. The additional effects of this (if any) should be investigated.
• Events for Tinkers support were added in the GroovyScript mod class. I suspect it would be better to move them elsewhere.
• Have yet to test this in a production environment.

[brachy84]

Mostly fine. Tell me when you tested everything and ill merge