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 );
 		}

src/main/java/appeng/fmp/QuartzTorchPart.java

@@ -31,6 +31,8 @@ import codechicken.multipart.minecraft.McBlockPart;
 import codechicken.multipart.minecraft.McSidedMetaPart;
 
 import appeng.api.AEApi;
+import appeng.api.exceptions.MissingDefinition;
+
 
 public class QuartzTorchPart extends McSidedMetaPart implements IRandomDisplayTick
 {
@@ -52,7 +54,12 @@ public class QuartzTorchPart extends McSidedMetaPart implements IRandomDisplayTi
 	@Override
 	public Block getBlock()
 	{
-		return AEApi.instance().blocks().blockQuartzTorch.block();
+		for ( Block torchBlock : AEApi.instance().definitions().blocks().quartzTorch().maybeBlock().asSet() )
+		{
+			return torchBlock;
+		}
+
+		throw new MissingDefinition( "Tried to retrieve a quartz torch, even though it is disabled." );
 	}
 
 	@Override