Add Authentication selection to F# web templates

[panesofglass]

The new MVC5 and Web API 2 templates launch a selection mechanism that allows the user to select an authentication scheme. The current templates would relate to the "No Authentication" option. We need to add additional templates that add the OWIN and/or WIF authentication given some parameters. If nothing else, we could add the Startup class and insert placeholders and a README to inform the user how to complete the configuration.

[kylone]

I'm actually working on this with my own project.

[panesofglass]

@kylone did you ever happen to build something we might be able to incorporate into the templates?

[kylone]

Not so much.