DocsController to handle all requests

Ok, baby steps this time.

I renamed SwaggerController to DocsController which eliminates the need for special swaggerApi route.

Then I moved the ActionFilter functionality into DocsController which handles it using default route of /docs/{id} = docscontroller/controllerName.  That eliminates ActionFilter and it's configuration.

Let me know if this is helpful and if so, any preferences you have for next pull request.

thx,
Dan