add = function(chunk) {
            data += chunk.toString();
        }
Send a raw request
@param {object} options - Request options 
{
		url: '', // May be a relative path when accessing the discogs API
		method: '', // Defaults to GET
		data: {} // POST/PUT data as an object
}
@param {function} callback - Callback function receiving the data
@return {DiscogsClient}