dab89c1682e091dfa3780ce95359ebea9f6b7d52
braney
  Thu May 18 09:49:17 2017 -0700
add licensing info to optimalLeaf library

diff --git src/optimalLeaf/Tree.hh src/optimalLeaf/Tree.hh
index f7831aa..eaf50d3 100644
--- src/optimalLeaf/Tree.hh
+++ src/optimalLeaf/Tree.hh
@@ -1,15 +1,21 @@
+/* This code provided by Ziv Bar-Joseph with the explicit understanding that 
+ * no licensing is required for it to be used in the UCSC Genome Browser
+ * as long as reference is made to this paper:
+ * https://www.ncbi.nlm.nih.gov/pubmed/12801867
+ */
+
 // --------------------------------------------------------------------
 //             Tree.hh
 // data structure for the hierarchical clustering tree.
 // Used to compute initial and optimal similarities, and to manipulate
 // (based on the optimal ordering) the ordering the tree nodes descendants.
 // -------------------------------------------------------------------------
 #ifndef TREE_HH
 #define TREE_HH
 
 #include "Leaf.hh"
 
 class Tree {
  private:
   Tree *left,*right; // left and right subtrees
   int numLeafs;