RFR: Add support for adding an issue when formatting the commit message

[Robin Westberg]

Hi all,

Please review this change that allows setting the issue of a commit through the PR title.

Best regards,
Robin

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Commits:
 - 6222eb97: Add support for adding an issue when formatting the commit message

  Stats: 97 lines in 8 files changed: 78 ins; 4 del; 15 mod
Changes: https://git.openjdk.java.net/skara/pull/148/files
 Webrev: https://webrevs.openjdk.java.net/skara/148/webrev.00
  Patch: https://git.openjdk.java.net/skara/pull/148.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/148/head:pull/148

PR: https://git.openjdk.java.net/skara/pull/148