add method to insert a node

Author: [email protected]

src/com/jwetherell/algorithms/data_structures/QuadTree.java

@@ -134,6 +134,13 @@ public boolean insert(double x, double y) {
             return root.insert((P)xyPoint);
         }
 
+        /**
+         * Add a node.
+         */
+        public boolean insert(P node) {
+            return root.insert(node);
+        }
+
         /**
          * {@inheritDoc}
          */