Add release notes for Review Board 2.0.27.
Review Request #412 — Created Feb. 17, 2017 and submitted
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. Testing Done: Built and checked the docs. Reviewed at https://reviews.reviewboard.org/r/8744/