RFR: 13: Add link to PR in emails to mailing list

[Robin Westberg via github.com]

Hi all,

Please review the following change that adds a note to composed emails with a link to the originating pull request.

Best regards,
Robin

----------------

Commits:
 - e357f7bc:	Add a note to composed emails with the link to the originating pull request

Pull request:
http://git.openjdk.java.net/skara/pull/22

Webrev:
https://openjdk.github.io/cr/skara/22/webrev.00

Patch:
http://git.openjdk.java.net/skara/pull/22.diff

Fetch command:
git fetch https://github.com/openjdk/skara.git e357f7bc:pr/22