Update changelog and add kochab to authors
Changelog
---------
+4.1.1 (unreleased)
+******************
+
+Bug fixes:
+
+* Fix bug in ``AIOHTTPParser`` that caused a ``JSONDecode`` error
+ when parsing empty payloads (:issue:`229`). Thanks :user:`explosic4`
+ for reporting and thanks user :user:`kochab` for the PR.
+
4.1.0 (2018-09-17)
******************
