Add documentation for integrations.

Review Request #9322 — Created Oct. 24, 2017 and submitted — Latest diff uploaded

Information

Review Board
release-3.0.x
9a21a09...

Reviewers

This change adds documentation for the top-level integrations UI, as
well as configuration docs for the three integrations shipped in
rb-integrations: CircleCI, Slack, and Travis CI.

  • Built HTML and checked the output.
  • Spell check.