v0.6.0

This release only include one small improvement in the man page compared to v0.6.0-rc1. Here is the complete changelog since version 0.5.0:

• Add a small comment on pull attach permissions in the man page (it can
  only be used if you are assigned to the issue or you have write access to
  the repo) (#66)
• GitHub Enterprise and other non-standard GitHub locations are now
  supported by making the GitHub API base URL configurable via git config hub.baseurl (#51)
• pull rebase now forces the rebasing by default. This means the Committer
  and CommitDate metadata is updated in all the rebased commits (even if the
  rebase could be just a fast-forward merge). This way the information about
  who, what and when stuff got "merged" doesn't get lost.
  If you want to go back to the previous default, set the git config hub.forcerebase to false. Also, to avoid confusion, the option
  --force was renamed to --force-push and the short alias -f was
  removed, as it shouldn't be a common operation in a rebase (#59)
• pull new and pull attach got the option --force renamed to
  --force-push to match the new name in pull rebase (#59)
• GitHub results are now fully retrieved (before if there were too many
  results from a query, the query was only partially retrieved) (#61)
• A serious encoding problem was fixed. This only manifested when the title
  of an issue was longer than 60 characters (#60)
• If there are GitHub errors while rebasing, now more information is printed
  to ease the debugging (#57)
• Several code cleanups and minor fixes (ef94d4b, d711c65, d39bbb9, 6f63324,
  bb83bd5, 7f027bb, 6cfc205)