add pypi badge

Author: rflamary

README.md

@@ -1,8 +1,8 @@
 # POT: Python Optimal Transport
 
-
-[![Documentation Status](https://readthedocs.org/projects/pot/badge/?version=latest)](http://pot.readthedocs.io/en/latest/?badge=latest)
+[![PyPI version](https://badge.fury.io/py/POT.svg)](https://badge.fury.io/py/POT)
 [![Build Status](https://travis-ci.org/rflamary/POT.svg?branch=master)](https://travis-ci.org/rflamary/POT)
+[![Documentation Status](https://readthedocs.org/projects/pot/badge/?version=latest)](http://pot.readthedocs.io/en/latest/?badge=latest)
 
 
 This open source Python library provide several solvers for optimization problems related to Optimal Transport for signal, image processing and machine learning.

docs/source/index.rst

@@ -17,7 +17,7 @@ Contents
    examples
 
 .. include:: readme.rst
-    :start-line: 5
+    :start-line: 6
 
 
 Indices and tables