Update README.md

Author: Artuto

README.md

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 # AuthServer
-Essential plugin for Auth servers
+[![License](https://img.shields.io/github/license/artuto/authserver.svg)](https://github.com/Artuto/AuthServer/blob/master/LICENSE)
+[![Jenkins](https://img.shields.io/jenkins/s/https/jenkins.artuto.tk/view/Plugins/job/AuthServer.svg)](https://jenkins.artuto.tk/view/Plugins/job/AuthServer/)
+[![AppVeyor](https://ci.appveyor.com/api/projects/status/71ro5uu4tp61qpqo?svg=true)](https://ci.appveyor.com/project/Artuto/authserver)
+
+
+Essential plugin for Auth and Lobby servers
+
+Spigot page: [Spigot](https://www.spigotmc.org/resources/64418/)