Make the DOI more visible

GaelVaroquaux · GaelVaroquaux · commit b594f4574e40 · 2015-09-28T23:02:38.000+02:00
diff --git a/preface.rst b/preface.rst
@@ -8,6 +8,10 @@ About the scipy lecture notes
 
 .. Hack to have multi-column layout in authors list
 
+.. image:: https://zenodo.org/badge/doi/10.5281/zenodo.31521.svg
+    :target: http://dx.doi.org/10.5281/zenodo.31521
+
+
 .. raw:: html
     
   <style type="text/css">
