[python-pbr/el6] (6 commits) ...Merge branch 'master' into el6

[Matthias Runge]

Summary of changes:

  b71f609... update to 0.5.23 (rhbz#1023926) (*)
  f835897... update to 0.6 (rhbz#1061124) (*)
  5b99fce... update to 0.7.0 (*)
  6421ea7... introduce py3 subpackage (*)
  b3ee31f... update to 0.8.0 (*)
  2a6ba10... Merge branch 'master' into el6

(*) This commit already existed in another branch; no separate mail sent