[python-virtualenvwrapper/f19] (4 commits) ...4.2

[Ralph Bean]

Summary of changes:

  801ddc6... - Rebuilt for https://fedoraproject.org/wiki/Fedora_20_Mass (*)
  8b9030b... Latest upstream. (*)
  aa8d16c... Require python-pbr for the build. (*)
  c957fe1... 4.2 (*)

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