Support custom API response status.

[dostermeier]

Not all RESTful API methods return a 200 on success. For example, it is common to return a 201 for a successful POST.

It seems like this would be a good candidate for another annotation, although I am weary of suggesting the creation of annotations for everything :)

It would be very useful to support some indication in the UI of what the response status of an API call will be. (aside from the error response statuses).

[fabiomaffioletti]

The response status will be a new attribute of the @apimethod annotation and will default to 200.