Add long_description to setup.py

setup.py

@@ -2,11 +2,19 @@
 from setuptools import setup
 
 
+def contents(filename):
+    from os.path import abspath, dirname, join
+    with open(join(abspath(dirname(__file__)), filename)) as fh:
+        return fh.read()
+
+
 setup(
     name='gmail-yaml-filters',
     author='Alex Levy',
     author_email='mesozoic@users.noreply.github.com',
     description='A quick tool for generating Gmail filters from YAML rules.',
+    long_description=contents('README.md'),
+    long_description_content_type='text/markdown',
     url='https://github.com/mesozoic/gmail-yaml-filters',
     version='0.9.1',
     classifiers=[