[skip ci] Add RRID badge

Author: oesteban

README.rst

@@ -35,6 +35,9 @@ open-source software distribution.
   :target: https://doi.org/10.1038/s41592-018-0235-4
   :alt: Published in Nature Methods
 
+.. image:: https://img.shields.io/badge/RRID-SCR__016216-blue.svg
+  :target: https://doi.org/10.1038/s41592-018-0235-4
+  :alt: RRID:SCR_016216
 
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