Pass headers to Controller responses methods

[tyzhnenko]

How about extending Controller methods which return Response object with headers parameter?

Some practical use cases are:

• pass X-Total-Page and other pagination headers with response
• pass cache headers like ETag and Last-Modified

...
    def accepted(self, message: MessageType = None, headers=None) -> Response:
        """
        Returns an HTTP 202 Accepted response, with optional message;
        sent as plain text or JSON.
        """
        return accepted(message, headers=None)

    def no_content(self, headers=None) -> Response:
        """
        Returns an HTTP 204 No Content response.
        """
        return no_content(headers=None)
...