Change MANIFEST.in static files from .rst to .md

Author: John-P

MANIFEST.in

@@ -1,11 +1,11 @@
-include AUTHORS.md
-include CONTRIBUTING.md
-include HISTORY.md
+include AUTHORS.rst
+include CONTRIBUTING.rst
+include HISTORY.rst
 include LICENSE
-include README.md
+include README.rst
 
 recursive-include tests *
 recursive-exclude * __pycache__
 recursive-exclude * *.py[co]
 
-recursive-include docs *.rst conf.py Makefile make.bat *.jpg *.png *.gif
+recursive-include docs *.md *.rst conf.py Makefile make.bat *.jpg *.png *.gif