Adds recognition for sgtwilko's contribution

Updates CHANGELOG

CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [Unreleased]
+
+### Fixed
+
+- Fixes an issue where gravatar icons would sometimes not show up — thanks to [PR #579](https://github.com/eamodio/vscode-gitlens/pull/579) by sgtwilko ([@sgtwilko](https://github.com/sgtwilko))
+- Fixes [#501](https://github.com/eamodio/vscode-gitlens/issues/501) — Azure DevOps ssh remotes aren't handled properly
+
 ## [9.0.3] - 2018-12-06
 
 ### Fixed

README.md

@@ -917,6 +917,7 @@ A big thanks to the people that have contributed to this project:
 - Johannes Rieken ([@jrieken](https://github.com/jrieken)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=jrieken)
 - ryenus ([@ryenus](https://github.com/ryenus)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=ryenus)
 - Zack Schuster ([@zackschuster](https://github.com/zackschuster)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=zackschuster)
+- sgtwilko ([@sgtwilko](https://github.com/sgtwilko)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=sgtwilko)
 - SpaceEEC ([@SpaceEEC](https://github.com/SpaceEEC)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=SpaceEEC)
 - Alexey Vasyukov ([@notmedia](https://github.com/notmedia)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=notmedia)
 - Zyck ([@qzyse2017](https://github.com/qzyse2017)) — [contributions](https://github.com/eamodio/vscode-gitlens/commits?author=qzyse2017)