[Rev 01] RFR: 401: Allow a PR author to manually add reviewers

[Robin Westberg]

> Hi all,
> 
> Please review this change that adds a `/reviewer` command that allows the PR author to manually add reviewers. The
> implementation is fairly similar to the `/contributor` command.
> Best regards,
> Robin

Robin Westberg has updated the pull request incrementally with one additional commit since the last revision:

  Move Review to reviewer names into a common helper function

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

Changes:
  - all: https://git.openjdk.java.net/skara/pull/630/files
  - new: https://git.openjdk.java.net/skara/pull/630/files/b9586b62..5328f868

Webrevs:
 - full: https://webrevs.openjdk.java.net/skara/630/webrev.01
 - incr: https://webrevs.openjdk.java.net/skara/630/webrev.00-01

  Stats: 41 lines in 4 files changed: 9 ins; 19 del; 13 mod
  Patch: https://git.openjdk.java.net/skara/pull/630.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/630/head:pull/630

PR: https://git.openjdk.java.net/skara/pull/630