Major Refactoring of Bootstrap Code (#75)

- Refactored boostrap code:
  * Completely reworked item/block/tile registration.
  * Fixed server side startup.
  * Fixed server side startup.
  * More documentation.
  * More heavy cleanup
  * More cleanups.
  * Major refactoring of state mapping and fixes a lot of other issue related to item rendering.
  * Fixes sky chest item models (no item TESR).
  * Only use CachingRotatingBakedModel for tile entities automatically.
  Fix default rotation of quartz pillar for item model.
  * Used method reference instead of lambda for ItemMeshDefinition for multiparts.
  * Removed unnecessary IHasSpecialItemModel
  * Removed unused IconReg class.
  * Updated resource pack version.

src/main/java/appeng/bootstrap/BlockRenderingCustomizer.java

@@ -0,0 +1,18 @@
+package appeng.bootstrap;
+
+
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+
+
+/**
+ * A callback that allows the rendering of a block to be customized. Sadly this class is required and no lambdas can be used
+ * due to them not being able to be annotated with @SideOnly(CLIENT).
+ */
+public abstract class BlockRenderingCustomizer
+{
+
+	@SideOnly( Side.CLIENT )
+	public abstract void customize( IBlockRendering rendering, IItemRendering itemRendering );
+
+}