DOC: add downloads to the readme.md page

Author: jreback

README.md

@@ -1,8 +1,6 @@
 # pandas: powerful Python data analysis toolkit
 
-[![Build Status](https://travis-ci.org/pydata/pandas.svg?branch=master)](https://travis-ci.org/pydata/pandas)
-[![Join the chat at
-https://gitter.im/pydata/pandas](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/pydata/pandas?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+|Build Status| |Gitter| |Downloads|
 
 ## What is it
 
@@ -227,3 +225,11 @@ list. Specialized discussions or design issues should take place on
 the PyData mailing list / Google group:
 
 https://groups.google.com/forum/#!forum/pydata
+
+.. |Build Status| image:: https://travis-ci.org/pydata/pandas.svg?branch=master
+   :target: https://travis-ci.org/pydata/pandas
+.. |Gitter| image:: https://badges.gitter.im/Join%20Chat.svg
+   :alt: Join the chat at https://gitter.im/pydata/pandas
+   :target: https://gitter.im/pydata/pandas?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
+.. |Downloads| image:: https://img.shields.io/pypi/dm/pandas.svg
+   :target: https://pypi.python.org/pypi/pandas/