Update README.md

Author: amitsaha

README.md

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-# code
-Chapter programs/snippets and Solutions to Challenges
+# Chapter programs and solutions
+
+Chapter programs/snippets and Solutions to Challenges for "Doing Math with Python".
+
+# Jupyter
+
+If you know what Jupyter (previously, IPython notebooks are), click below to launch the program notebooks in Jupyter powered by Binder:
+
+[![Binder](http://mybinder.org/badge.svg)](http://mybinder.org/repo/doingmathwithpython/code)