Keep nodes in leafs

src/example.rs

@@ -39,4 +39,10 @@ fn main() {
     );
 
     println!("{}", kdtree);
+
+    kdtree.traverse_leaves(&mut |locations, elements| {
+        for element in elements {
+            println!("{}", element);
+        }
+    });
 }

src/lib.rs

@@ -58,7 +58,7 @@ impl<T: Clone> KdTree<T> where {
 
         // Build the left and right branches
         let mut left = vec![];
-        for i in &points[0..delimiter] {
+        for i in &points[0..delimiter + 1] {
             left.push(i.clone());
         }