DOC: Added pypi zipline version badge

README.rst

@@ -7,7 +7,8 @@
 =============
 
 |Gitter|
-|version status|
+|pypi version status|
+|pypi pyversion status|
 |travis status|
 |appveyor status|
 |Coverage Status|
@@ -134,7 +135,9 @@ Feel free to ask questions on the `mailing list <https://groups.google.com/forum
 
 .. |Gitter| image:: https://badges.gitter.im/Join%20Chat.svg
    :target: https://gitter.im/quantopian/zipline?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
-.. |version status| image:: https://img.shields.io/pypi/pyversions/zipline.svg
+.. |pypi version status| image:: https://img.shields.io/pypi/v/zipline.svg
+   :target: https://pypi.python.org/pypi/zipline
+.. |pypi pyversion status| image:: https://img.shields.io/pypi/pyversions/zipline.svg
    :target: https://pypi.python.org/pypi/zipline
 .. |travis status| image:: https://travis-ci.org/quantopian/zipline.svg?branch=master
    :target: https://travis-ci.org/quantopian/zipline