Merge pull request #11 from xgcm/zenodo_badge

Add zenodo DOI badge

README.rst

@@ -1,7 +1,7 @@
 fastjmd95: Numba implementation of Jackett & McDougall (1995) ocean equation of state
 =====================================================================================
 
-|Build Status| |license|
+|Build Status| |license| |zenodo|
 
 This package provides a Numba_ implementation the JMD95 equation of state.
 
@@ -42,3 +42,6 @@ Tutorial notebook located at `doc/fastjmd95_tutorial.ipynb <https://nbviewer.jup
 .. |license| image:: https://img.shields.io/github/license/mashape/apistatus.svg
    :target: https://github.com/xgcm/fastjmd95
    :alt: license
+.. |zenodo| image:: https://zenodo.org/badge/238613964.svg
+   :target: https://zenodo.org/badge/latestdoi/238613964
+   :alt: zenodo doi