fix setup for markdown

MANIFEST.in

@@ -1 +1 @@
-include README.rst
+include README.md

setup.py

@@ -41,7 +41,7 @@ here = os.path.abspath(os.path.dirname(__file__))
 
 # Import the README and use it as the long-description.
 # Note: this will only work if 'README.rst' is present in your MANIFEST.in file!
-with io.open(os.path.join(here, 'README.rst'), encoding='utf-8') as f:
+with io.open(os.path.join(here, 'README.md'), encoding='utf-8') as f:
     long_description = '\n' + f.read()
 
 # Load the package's __version__.py module as a dictionary.