RFR: Add merge bot

[Erik Duveblad via github.com]

The pull request has been updated with additional changes.

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

Added commits:
 - 05186111:	Fix wording of message

Pull request:
https://git.openjdk.java.net/skara/pull/104

Webrevs:
 - full: https://webrevs.openjdk.java.net/skara/104/webrev.01
 - inc: https://webrevs.openjdk.java.net/skara/104/webrev.00-01

Updated full patch:
https://git.openjdk.java.net/skara/pull/104.diff

Fetch command:
git fetch https://git.openjdk.java.net/skara pull/104/head:pull/104