Add CI badges [ci skip]

README.rst

@@ -5,11 +5,17 @@ synphot
     :target: http://synphot.readthedocs.io/en/latest/?badge=latest
     :alt: Documentation Status
 
+.. image:: https://dev.azure.com/spacetelescope/synphot_refactor/_apis/build/status/spacetelescope.synphot_refactor?branchName=master
+    :target: https://dev.azure.com/spacetelescope/synphot_refactor/_build/latest?definitionId=2&branchName=master
+    :alt: Azure CI Status
+
 .. image:: https://travis-ci.org/spacetelescope/synphot_refactor.svg?branch=master
     :target: https://travis-ci.org/spacetelescope/synphot_refactor
+    :alt: Travis CI Status
 
 .. image:: https://ci.appveyor.com/api/projects/status/jc4f77cpng8iyvnd/branch/master?svg=true
     :target: https://ci.appveyor.com/project/pllim/synphot-refactor/branch/master
+    :alt: Appveyor CI Status
 
 .. image:: https://codecov.io/gh/spacetelescope/synphot_refactor/branch/master/graph/badge.svg
     :target: https://codecov.io/gh/spacetelescope/synphot_refactor