Document search sort parameters (#370)

Author: Matt Willer

lib/managers/search.js

@@ -78,6 +78,8 @@ Search.prototype = {
 	 * @param {SearchMetadataFilter[]} [options.mdfilters] - Searches for objects with a specific metadata object association.  Searches with the this parameter do not require a query string
 	 * @param {int} [options.limit=30] - The number of search results to return, max 200
 	 * @param {int} [options.offset=0] - The search result at which to start the response, must be a multiple of limit
+	 * @param {string} [options.sort] - The field on which the results should be sorted, e.g. "modified_at"
+	 * @param {string} [options.direction] - The sort direction: "ASC" for ascending and "DESC" for descending
 	 * @param {APIRequest~Callback} [callback] - passed the new comment data if it was posted successfully
 	 * @returns {Promise<Object>} A promise resolving to the collection of search results
 	 */