python-grequests-0.2.0-bp151.3.1

- update to version 0.2.0:
  * no changelog available
- add python-requests as a runtime dependency
- add python-gevent and python-requests as build dependencies to
  ensure their availability
- rename README to README.rst to follow upstream

- Require python-setuptools instead of distribute (upstreams merged)

- Clarify licensing. According to the author it's BSD-2-Claus (see
  https://github.com/kennethreitz/grequests/issues/7)

- Initial version