UPDATE - 17th November 2015
Add Service Widget - 1.2
Widget updated with WMS functionality. Apologies for how long this took, but it was quite a complex task. I finally found a workflow I was happy with, that would also support non-ESRI WMS. This widget cannot handle secured WMS.
The widget requires some configuration in the config.json file. It is an array of the GIS servers that you will be adding web services from. The code handles this and pushes them as corsEnabledServers. If the server isn't CORS enabled, I believe it won't permit adding of the service in your application.
