Make post-review show a deprecation warning.

Review Request #5201 — Created Jan. 6, 2014 and submitted — Latest diff uploaded

Information

RBTools
master

Reviewers

Make post-review show a deprecation warning.

This adds a deprecation warning to the 0.5.x branch, to warn people that
post-review is going away in the next major release.

Installed from the release-0.5.x branch and ran post-review. Saw the
warning.