Merge pull request #771 from openedx/farhan/add-long-description

fix: Fix pypi error related to long_description

Author: farhan

setup.py

@@ -32,6 +32,8 @@ def get_version(*file_paths):
     name='XBlock',
     version=VERSION,
     description='XBlock Core Library',
+    long_description=open('README.rst').read(),
+    long_description_content_type='text/x-rst',
     packages=[
         'xblock',
         'xblock.django',