README.md in pivotal_to_pdf-0.9 vs README.md in pivotal_to_pdf-0.9.1

@@ -31,9 +31,10 @@
 Printed a green bounding box for feature, a yellow box for chores and a red box for bugs
 
 The gem assumes that you have https access to the pivotal tracker
 
 ##Contributors
-* Yi Wen
+* [Yi Wen](https://github.com/ywen)
 * Carol Nichols
 * Kristian Rasmussen 
 * [Alastair Mair](https://github.com/amair)
+* [John-Mason P. Shackelford](https://github.com/jpshackelford)