Cables & parts and Baking pipeline

- Added cables & parts rendering.
- Facades got a completely new way of rendering. Anvil facades are
totally a thing.
- Added baking pipeline for simplified, highly configurable quad baking.

NOTE: Yes, there are a lot of improvements to do, bugs to fix, stuff to
add. I'm just pushing it prior to code structure change, so it does not
get lost in stashes. But it actually works!

src/main/java/appeng/parts/automation/PartAnnihilationPlane.java

@@ -208,7 +208,7 @@ public class PartAnnihilationPlane extends PartBasicState implements IGridTickab
 	}
 
 	@Override
-	public int cableConnectionRenderTo()
+	public int getCableConnectionLength()
 	{
 		return 1;
 	}

src/main/java/appeng/parts/automation/PartExportBus.java

@@ -184,7 +184,7 @@ public class PartExportBus extends PartSharedItemBus implements ICraftingRequest
 	}
 
 	@Override
-	public int cableConnectionRenderTo()
+	public int getCableConnectionLength()
 	{
 		return 5;
 	}

src/main/java/appeng/parts/automation/PartFormationPlane.java

@@ -274,7 +274,7 @@ public class PartFormationPlane extends PartUpgradeable implements ICellContaine
 	}
 
 	@Override
-	public int cableConnectionRenderTo()
+	public int getCableConnectionLength()
 	{
 		return 1;
 	}

src/main/java/appeng/parts/automation/PartImportBus.java

@@ -95,7 +95,7 @@ public class PartImportBus extends PartSharedItemBus implements IInventoryDestin
 	}
 
 	@Override
-	public int cableConnectionRenderTo()
+	public int getCableConnectionLength()
 	{
 		return 5;
 	}

src/main/java/appeng/parts/automation/PartLevelEmitter.java

@@ -425,7 +425,7 @@ public class PartLevelEmitter extends PartUpgradeable implements IEnergyWatcherH
 	}
 
 	@Override
-	public int cableConnectionRenderTo()
+	public int getCableConnectionLength()
 	{
 		return 16;
 	}