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/crafting/BlockCraftingMonitor.java

@@ -32,7 +32,6 @@ import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 
 import appeng.api.AEApi;
-import appeng.client.render.BaseBlockRender;
 import appeng.client.render.blocks.RenderBlockCraftingCPUMonitor;
 import appeng.client.texture.ExtraBlockTextures;
 import appeng.tile.crafting.TileCraftingMonitorTile;
@@ -46,9 +45,10 @@ public class BlockCraftingMonitor extends BlockCraftingUnit
 	}
 
 	@Override
-	protected Class<? extends BaseBlockRender> getRenderer()
+	@SideOnly( Side.CLIENT )
+	protected RenderBlockCraftingCPUMonitor getRenderer()
 	{
-		return RenderBlockCraftingCPUMonitor.class;
+		return new RenderBlockCraftingCPUMonitor();
 	}
 
 	@Override

src/main/java/appeng/block/crafting/BlockCraftingUnit.java

@@ -36,7 +36,6 @@ import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 
 import appeng.block.AEBaseTileBlock;
-import appeng.client.render.BaseBlockRender;
 import appeng.client.render.blocks.RenderBlockCraftingCPU;
 import appeng.client.texture.ExtraBlockTextures;
 import appeng.core.features.AEFeature;
@@ -59,9 +58,10 @@ public class BlockCraftingUnit extends AEBaseTileBlock
 	}
 
 	@Override
-	protected Class<? extends BaseBlockRender> getRenderer()
+	@SideOnly( Side.CLIENT )
+	protected RenderBlockCraftingCPU<? extends BlockCraftingUnit, ? extends TileCraftingTile> getRenderer()
 	{
-		return RenderBlockCraftingCPU.class;
+		return new RenderBlockCraftingCPU<BlockCraftingUnit, TileCraftingTile>();
 	}
 
 	@Override

src/main/java/appeng/block/crafting/BlockMolecularAssembler.java

@@ -30,7 +30,6 @@ import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 
 import appeng.block.AEBaseTileBlock;
-import appeng.client.render.BaseBlockRender;
 import appeng.client.render.blocks.RenderBlockAssembler;
 import appeng.core.features.AEFeature;
 import appeng.core.sync.GuiBridge;
@@ -68,9 +67,9 @@ public class BlockMolecularAssembler extends AEBaseTileBlock
 
 	@Override
 	@SideOnly( Side.CLIENT )
-	public Class<? extends BaseBlockRender> getRenderer()
+	public RenderBlockAssembler getRenderer()
 	{
-		return RenderBlockAssembler.class;
+		return new RenderBlockAssembler();
 	}
 
 	@Override