For GitLab: CHANGES.txt -> CHANGELOG.rst, README.txt -> README.rst

MANIFEST.in

-include CHANGES.txt
+include CHANGELOG.rst

setup.py

@@ -6,13 +6,13 @@ version = '0.14.5'
 
 
 def read(*rnames):
-  return open(os.path.join(os.path.dirname(__file__), *rnames)).read()
-
+  with open(os.path.join(os.path.dirname(__file__), *rnames)) as f:
+    return f.read()
 
 long_description = (
-        read('README.txt')
+        read('README.rst')
         + '\n' +
-        read('CHANGES.txt')
+        read('CHANGELOG.rst')
     )
 
 additional_install_requires = []