Feature/xmldoc

Fix #375 

Or that's what I'm crossing my fingers it will. I'm guessing at [where files will be picked up](https://nudoq.uservoice.com/forums/223379-nudoq-feedback/suggestions/4810583-document-what-nudoq-looks-for-when-generating-docu) and that's the "beauty" of web-services,you can't really test it out locally :smile: We'll simply *have* to push something to NuGet.org andsee if it gets picked up.