Config to only render routing lines while an INodeRenderer is held

Current INodeRenderer's are the Node Router and all Routing Nodes

src/main/java/WayofTime/bloodmagic/api/iface/INodeRenderer.java

@@ -0,0 +1,9 @@
+package WayofTime.bloodmagic.api.iface;
+
+/**
+ * Held items that implement this will cause the beams between
+ * routing nodes to render.
+ */
+public interface INodeRenderer
+{
+}