README.rst added badge for Azure pipelines

Author: testmikaem

README.rst

@@ -5,6 +5,9 @@ mpi4py-fft
 .. image:: https://circleci.com/bb/mpi4py/mpi4py-fft.svg?style=svg
     :target: https://circleci.com/bb/mpi4py/mpi4py-fft
 
+.. image:: https://dev.azure.com/mpi4py/mpi4py-fft/_apis/build/status/mpi4py.mpi4py-fft?branchName=master
+    :target: https://dev.azure.com/mpi4py/mpi4py-fft
+
 .. image:: https://api.codacy.com/project/badge/Grade/7e236bbdc44e4a68b8f6dfc3d3170cf0    
     :target: https://www.codacy.com/app/mpi4py/mpi4py-fft?utm_source=github.com&utm_medium=referral&utm_content=mpi4py/mpi4py-fft&utm_campaign=Badge_Grade