Add flag to include additional request/response data in stripe api calls

[redtopia]

While debugging, I have had the need to see the headers and other data used for the Stripe API request. It would be nice to either always include this data, or add a flag to the stripe.call() method to allow some raw request data to be sent back to the caller. What I did is modified the .call() method as follows:

        var rawResponse = httpService.makeRequest(
            methodMetadata.httpmethod,
            path,
            headerData.headers,
            params,
            methodMetadata.multipart
        );

        var response = { };

	response[ 'http' ] = {
		'path': path,
		'headerData': headerData,
		'params': params,
		'rawResponse': rawResponse,
		'methodMetadata': methodMetadata,
	};

However, in the case of an exception, I wouldn't see this because the .call() method doesn't catch exceptions and if one occurs, there would be no response struct being returned. Personally, I think it would be better for the .call() method to catch exceptions and therefore would always return a struct that would include the error information if an exception was thrown. That being said, I understand that could break existing applications so I'm not making that request.