Add release notes for Review Board 2.0.27.

Review Request #8744 — Created Feb. 14, 2017 and submitted — Latest diff uploaded

Information

Review Board
release-2.0.x
78fa350...

Reviewers

This is a small release that fixes a comment ordering regression found
in 2.0.26, along with clipboard bugs in the diff viewer, My Account form
visibility bugs for extensions, and crashes with certain logging calls
on older versions of Python.

Built and checked the docs.