Switch over to the new Markdown support in Djblets.

Review Request #7317 — Created May 18, 2015 and submitted — Latest diff uploaded

Information

Review Board
release-2.5.x
6e4eac8...

Reviewers

Much of the custom Markdown processing code in Review Board has been
moved over to Djblets. We're now using this centralized code instead,
wrapping it where necessarily to provide backwards-compatibilty (with
deprecation warnings) for extensions. This is less code to maintain in
Review Board.

Unit tests pass.

Tested Markdown rendering, e-mail previews, and Markdown file attachments.