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/IBlockRendering.java

@@ -0,0 +1,34 @@
+package appeng.bootstrap;
+
+
+import java.util.function.BiFunction;
+
+import net.minecraft.client.renderer.block.model.IBakedModel;
+import net.minecraft.client.renderer.block.model.ModelResourceLocation;
+import net.minecraft.client.renderer.block.statemap.IStateMapper;
+import net.minecraft.client.renderer.color.IBlockColor;
+import net.minecraft.client.renderer.color.IItemColor;
+import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+
+
+/**
+ * Allows for client-side rendering to be customized in the context of block/item registration.
+ */
+public interface IBlockRendering
+{
+
+	@SideOnly( Side.CLIENT )
+	IBlockRendering modelCustomizer( BiFunction<ModelResourceLocation, IBakedModel, IBakedModel> customizer );
+
+	@SideOnly( Side.CLIENT )
+	IBlockRendering blockColor( IBlockColor blockColor );
+
+	@SideOnly( Side.CLIENT )
+	IBlockRendering stateMapper( IStateMapper mapper );
+
+	@SideOnly( Side.CLIENT )
+	IBlockRendering tesr( TileEntitySpecialRenderer<?> tesr );
+
+}