How to install Maya Animation Rigging toolset in with maya 2017

So I have located the plugin file, userSetup.py, but it throws an error in maya 2016:

// Error: file: D:/Program Files/Autodesk/Maya2016/scripts/others/pluginWin.mel line 781: (userSetup) //
// Warning: file: D:/Program Files/Autodesk/Maya2016/scripts/others/pluginWin.mel line 781: No initializePlugin() or initializePlugin2() function

Any ideas what’s going on?