Item Rendering (80%)
Fix tools render + add new render
Add base item render for metadata item (not rendering using metadata actually)
Add Crafting Station rendering
Add flintBlock render
fixed Backpacks
Changed from GL11 to the new GlStateManager
Small refomatting
Some work on the lockable doors.
MathUtils, a helper class for all kinds of AABB and Vec3 manipulation,
partial rewrite of lockable doors.
Changed the doors to use scheduled ticks.