Added routing nodes and a bit of infrastructure - not even working yet.

src/main/java/WayofTime/bloodmagic/routing/NodeHelper.java

@@ -0,0 +1,25 @@
+package WayofTime.bloodmagic.routing;
+
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.BlockPos;
+import net.minecraft.world.World;
+
+public class NodeHelper
+{
+    public static boolean isNodeConnectionEnabled(World world, IRoutingNode node, BlockPos testPos)
+    {
+        if (!node.isConnectionEnabled(testPos))
+        {
+            return false;
+        }
+        TileEntity tile = world.getTileEntity(testPos);
+        if (!(tile instanceof IRoutingNode))
+        {
+            return false;
+        }
+
+        IRoutingNode testNode = (IRoutingNode) tile;
+
+        return testNode.isConnectionEnabled(node.getBlockPos());
+    }
+}