re-adding changelog entry that slipped out of a commit when 2.0.0 was released
re-adding changelog entry that slipped out of a commit when 2.0.0 was released

git-svn-id: 58c78e01c35a50cf7359cc800f5035f798b98bc3@944195 13f79535-47bb-0310-9956-ffa450edef68

tcl-mirror/rivet,tcl-mirror/rivet,tcl-mirror/rivet,tcl-mirror/rivet