Rendering cleanup

Replaces the reflexive instantiation of the Renderes with a factory
method.

Some optimizations to the renderers to no longer push the whole OpenGL state to the stack.

General cleanup of duplicate code, etc

src/main/java/appeng/block/misc/BlockInterface.java

@@ -26,9 +26,11 @@ import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.world.World;
 import net.minecraftforge.common.util.ForgeDirection;
 
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
+
 import appeng.api.util.IOrientable;
 import appeng.block.AEBaseTileBlock;
-import appeng.client.render.BaseBlockRender;
 import appeng.client.render.blocks.RenderBlockInterface;
 import appeng.core.features.AEFeature;
 import appeng.core.sync.GuiBridge;
@@ -48,9 +50,10 @@ public class BlockInterface extends AEBaseTileBlock
 	}
 
 	@Override
-	protected Class<? extends BaseBlockRender> getRenderer()
+	@SideOnly( Side.CLIENT )
+	protected RenderBlockInterface getRenderer()
 	{
-		return RenderBlockInterface.class;
+		return new RenderBlockInterface();
 	}
 
 	@Override