desc as markdown

Author: wasade

setup.py

@@ -128,6 +128,7 @@ def run(self):
           'click',
           'scikit-bio >= 0.5.0, < 0.6.0'],
       long_description=long_description,
+      long_description_content_type='text/markdown',
       cmdclass=versioneer.get_cmdclass({'build_py': BitArrayBuild,
                                         'install': BitArrayInstall,
                                         'develop': BitArrayDevelop,