[python-djblets/el6] (3 commits) ...Merge branch 'master' into el6

[Stephen Gallagher]

Summary of changes:

  05a98a4... Fix Django requirement for F18+ (*)
  0f6bdf2... New upstream release 0.6.18 (*)
  21dde5c... Merge branch 'master' into el6

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