Add repo status badge

README.rst

@@ -2,7 +2,7 @@
 Stingray
 ========
 
-|Build Status Master| |Docs| |Slack| |joss| |doi| |Coverage Status Master| |GitHub release|
+|Build Status Master| |Docs| |Slack| |joss| |doi| |Coverage Status Master| |GitHub release| |Repo status|
 
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 X-Ray Spectral Timing Made Easy
@@ -83,6 +83,10 @@ The code is distributed under the MIT license; see `LICENSE.rst <LICENSE.rst>`_
    :target: https://doi.org/10.21105/joss.01393
 .. |doi| image:: https://zenodo.org/badge/DOI/10.5281/zenodo.1490116.svg
    :target: https://doi.org/10.5281/zenodo.1490116
+.. |Repo status| image:: https://www.repostatus.org/badges/latest/active.svg
+   :alt: Project Status: Active – The project has reached a stable, usable state and is being actively developed.
+   :target: https://www.repostatus.org/#active
+
 .. _Astropy: https://www.github.com/astropy/astropy
 .. _Issues: https://www.github.com/stingraysoftware/stingray/issues
 .. _Issue: https://www.github.com/stingraysoftware/stingray/issues