Update AUTHORS and CHANGELOG for latest 0.9.x fixes

AUTHORS.rst

@@ -78,3 +78,5 @@ Contributors
 - Alex Couper (@alexcouper)
 - Marc Abramowitz (@msabramo)
+
+- Adrian Moisey (@adrianmoisey)

HISTORY.rst

 History/Changelog
 -----------------
+0.9.3: 2014-11-0x
+~~~~~~~~~~~~~~~~~
+
+- Backport of ``PullRequest#create_review_comment`` by Adrian Moisey
+
+- Backport of ``PullRequest#review_comments`` by Adrian Moisey
+
+- Documentation typo fix by Marc Abramowitz
+
 0.9.2: 2014-10-05
 ~~~~~~~~~~~~~~~~~