python-bencode-1.2.0-bp151.3.1

- update to match bencode v1.2.0
  * See bencode v.2.0 for history.  This package is a simple fork of the metadata decode logic.
- add buildrequires: python-pbr which is used to provide reasonable defaults python's setup tool
- convert to python singlespec

- Initial package release, version 1.0