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/server/AECommand.java

@@ -69,10 +69,12 @@ public class AECommand extends CommandBase
 					throw new WrongUsageException( c.command.getHelp( this.srv ) );
 				}
 			}
+			catch ( WrongUsageException wrong )
+			{
+				throw wrong;
+			}
 			catch (Throwable er)
 			{
-				if ( er instanceof WrongUsageException )
-					throw (WrongUsageException) er;
 				throw new WrongUsageException( "commands.ae2.usage" );
 			}
 		}
@@ -90,10 +92,12 @@ public class AECommand extends CommandBase
 				else
 					throw new WrongUsageException( "commands.ae2.permissions" );
 			}
+			catch ( WrongUsageException wrong )
+			{
+				throw wrong;
+			}
 			catch (Throwable er)
 			{
-				if ( er instanceof WrongUsageException )
-					throw (WrongUsageException) er;
 				throw new WrongUsageException( "commands.ae2.usage" );
 			}
 		}