fix for primitive type in models section of swagger

add test for issue85 ; not (yet) reproduced
fix key in Swagger models for anonymous types

add Readme for how to use Swagger UI
added example for serving html files from a template
added LastWriteError
Write methods now return error i.o. *Response
improved CORS by case insensitive header comparison
better CORS example
Merge branch 'write-error'

With this change, all Write methods of restful.Response return an error if the underlying Write reports it.
Merge + CORS improvement