Update README.md

Author: nborwankar

README.md

@@ -89,12 +89,15 @@ IPython Notebooks at Beta.
 * [Z1. Appendix 1 Plotting code snippets ](http://nbviewer.ipython.org/urls/raw.github.com/nborwankar/LearnDataScience/master/notebooks/Z1.%20Appendix%201%20Plotting%20code%20snippets%20.ipynb)
 
 
-Installation  
-------------
+Background  
+----------
 
-* Background  
 If you are unfamiliar with IPython Notebook you can start with http://ipython.org/notebook
 
+
+Installation  
+------------
+
 * Prerequisites  
 One of the following distributions is needed.