Add moar shields to readme

Author: kriskbx

readme.md

@@ -1,6 +1,10 @@
 # ![gtt](https://raw.githubusercontent.com/kriskbx/gitlab-time-tracker-taskbar/master/src/icons/png/64x64.png) gtt taskbar
 
-[![Travis (.org)](https://img.shields.io/travis/kriskbx/gitlab-time-tracker-taskbar.svg?style=flat-square)](https://travis-ci.org/kriskbx/gitlab-time-tracker-taskbar)
+[![Github All Releases](https://img.shields.io/github/downloads/kriskbx/gitlab-time-tracker-taskbar/total.svg?style=flat-square)](https://github.com/kriskbx/gitlab-time-tracker-taskbar/releases)
+[![GitHub (pre-)release](https://img.shields.io/github/release/kriskbx/gitlab-time-tracker-taskbar/all.svg?style=flat-square)](https://github.com/kriskbx/gitlab-time-tracker-taskbar/releases)
+[![Travis (Linux, Mac OS)](https://img.shields.io/travis/kriskbx/gitlab-time-tracker-taskbar/production.svg?style=flat-square)](https://travis-ci.org/kriskbx/gitlab-time-tracker-taskbar)
+[![AppVeyor (Windows)](https://img.shields.io/appveyor/ci/kriskbx/gitlab-time-tracker-taskbar/production.svg?style=flat-square)](https://ci.appveyor.com/project/kriskbx/gitlab-time-tracker-taskbar)
+[![GitHub](https://img.shields.io/github/license/kriskbx/gitlab-time-tracker-taskbar.svg?style=flat-square)](https://github.com/kriskbx/gitlab-time-tracker-taskbar/blob/master/LICENSE)
 
 >  An open source crossplatform menubar/taskbar application for GitLab's time tracking feature based on the [gtt command line interface](https://github.com/kriskbx/gitlab-time-tracker).