Update README.md

Author: jtleek

README.md

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-courses
-=======
 
-Course materials for the Data Science Specialization: https://www.coursera.org/specialization/jhudatascience/1
+### Data Science Specialization
+
+These are the course materials for the Johns Hopkins Data Science Specialization on Coursera
+
+https://www.coursera.org/specialization/jhudatascience/1
+
+Materials are under development and subject to change. 
+
+
+### Contributors
+
+* Brian Caffo
+* Jeff Leek
+* Roger Peng
+* Nick Carchedi 
+* Sean Kross
+
+### License
+
+These course materials are available under the Mozilla Public License (http://www.tldrlegal.com/l/MPL2). 
+