message: setup: improve description
  * setup: improve description
  * setup: use README.md as long_description
  As pypy.io now should render markdown.
diff: @@ -16,6 +16,9 @@ PACKAGE_FILE = os.path.join(PACKAGE_DIR, 'package.json')
  with open(PACKAGE_FILE) as package_file:
  version_string = json.load(package_file)['version']
  +with open('README.md') as readme:
  + long_description = readme.read()
  +
  def get_git_sha():
  try:
  @@ -42,8 +45,8 @@ with open(os.path.join(PACKAGE_DIR, 'version_info.json'), 'w') as version_file:
  setup(
  name='superset',
  description=(
  - 'A interactive data visualization platform build on SqlAlchemy '
  - 'and druid.io'),
  + 'A modern, enterprise-ready business intelligence web application'),
  + long_description=long_description,
  version=version_string,
  packages=find_packages(),
  include_package_data=True,
  