Xtra materials 2.0

Re-wrote all code and made some new blocks and items.
+ Added Snow Troll
+ Re-wrote titanium ingot, ore, and unsmelted titanium
+ Made titanium ore spawn naturally
+ Added titanium sword and titanium pickaxe
+ Added lightning sword
+ Added lightning conductor (Used in lightning sword crafting)
+ Added titanium block
+ Added crafting recipes for everything