Fixes #675 No disabled feature should log spam or crash anymore.

Deprecates the old usage of the AEItemDefinitions via the direct method access of

* blocks()
* parts()
* items()
* materials()

and thus use the new re-direct via definitions().

All definitions are now initialized, no matter what. But SubItems, Items and Blocks are not registered, if by chance are disabled.

src/main/java/appeng/block/stair/SkyStoneBrickStairBlock.java

@@ -31,6 +31,6 @@ public class SkyStoneBrickStairBlock extends AEBaseStairBlock
 {
 	public SkyStoneBrickStairBlock( Block block, Integer meta )
 	{
-		super( block, meta, EnumSet.of( AEFeature.Core ) );
+		super( block, meta, EnumSet.of( AEFeature.DecorativeQuartzBlocks ) );
 	}
 }