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/fmp/PartRegistry.java

@@ -51,7 +51,7 @@ public enum PartRegistry
 		try
 		{
 			if ( this == CableBusPart )
-				return (TMultiPart) Api.INSTANCE.partHelper.getCombinedInstance( this.part.getName() ).newInstance();
+				return (TMultiPart) Api.INSTANCE.getPartHelper().getCombinedInstance( this.part.getName() ).newInstance();
 			else
 				return this.part.getConstructor( int.class ).newInstance( meta );
 		}