Fix README.rst → README.md (#1217)

Fix a couple of instances where the file name `README.rst` was not
updated when the file was renamed.

Author: mhucka

MANIFEST.in

@@ -1,7 +1,7 @@
 include LICENSE
 include MANIFEST.in
 include NOTICE
-include README.rst
+include README.md
 include dev_tools/requirements/deps/runtime.txt
 include dev_tools/requirements/deps/resource_estimates_runtime.txt
 include setup.py

setup.py

@@ -21,7 +21,7 @@
 
 # The readme file is used as the long_description:
 long_description = '===========\n' + 'OpenFermion\n' + '===========\n\n'
-with open('README.rst', 'r', encoding='utf-8') as readme:
+with open('README.md', 'r', encoding='utf-8') as readme:
     long_description += readme.read()
 
 # Read in package requirements.txt.