Implemented drive models. Fixed issues with the UVL model loader using a null model loader (and thus crashing).

src/main/java/appeng/block/storage/DriveRendering.java

@@ -0,0 +1,17 @@
+package appeng.block.storage;
+
+
+import appeng.bootstrap.BlockRenderingCustomizer;
+import appeng.bootstrap.IBlockRendering;
+import appeng.bootstrap.IItemRendering;
+import appeng.client.render.model.DriveModel;
+
+
+public class DriveRendering extends BlockRenderingCustomizer
+{
+	@Override
+	public void customize( IBlockRendering rendering, IItemRendering itemRendering )
+	{
+		rendering.builtInModel( "models/block/builtin/drive", new DriveModel() );
+	}
+}