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

diff --git src/optimalLeaf/Leaf.hh src/optimalLeaf/Leaf.hh
index aa2ac14..11fa177 100644
--- src/optimalLeaf/Leaf.hh
+++ src/optimalLeaf/Leaf.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
+ */
+
 // --------------------------------------------------------------------
 //                         Leaf.hh
 // This is where the optimal ordering for two subtrees 
 // is comnputed. Uses the known optimal ordering for 
 // each of the subtrees to generate the new ordering of the combined tree.
 // ---------------------------------------------------------------------
 #ifndef LEAF_HH
 #define LEAF_HH
 
 // used for every possible pair of rightmost and leftmost leaves
 // to find the best leaves in the intersection for this pair 
 class LeafPair {
 public:
   LeafPair(int l,int r,LeafPair *pl,LeafPair *pr,int t1,int t2);
   int leftLeaf;