Fix visual glitches and desyncs with item bag (fixes #252)

* Render update would not trigger recalculation of fill level
* Updates via GUI/ItemHandler would not sync from server NOR trigger recalculation

common/net/teamio/taam/content/conveyors/TileEntityConveyorItemBag.java

@@ -24,10 +24,18 @@ public class TileEntityConveyorItemBag extends ATileEntityAttachable {
 	public float fillPercent;
 
 	public TileEntityConveyorItemBag() {
-		itemHandler = new ItemStackHandler(5);
+		itemHandler = new ItemStackHandler(5) {
+			@Override
+			protected void onContentsChanged(int slot) {
+				renderUpdate();
+				updateState(true, false, false);
+			}
+		};
+
 		conveyorSlots = new ConveyorSlotsInventory(itemHandler, SLOT_MATRIX) {
 			@Override
 			public void onChangeHook() {
+				renderUpdate();
 				updateState(true, false, false);
 			}
 		};
@@ -41,6 +49,11 @@ public String getName() {
 
 	@Override
 	public void blockUpdate() {
+		renderUpdate();
+	}
+
+	@Override
+	public void renderUpdate() {
 		if (world != null && world.isRemote) {
 			/*
 			 * Fill display calculation is only needed on the client..