Generate for URL

[chb0github]

The ability to supply a URL and generate code would be handy.

[jimschubert]

This may be pretty simple for a basic use case, like a menu item Generate for URL which displays a dialog to accept a URL and then triggers the current options input window. However, Swagger Codegen supports authentication against URLs supplied as Swagger definitions, and I think that adds some complexity. I'd have to think about how to handle it.

Unfortunately, I've been pretty busy recently and it'll probably be a while until I get around to this.