add documentation for ace.require

lib/ace/ace.js

@@ -55,6 +55,15 @@ require("./placeholder");
 require("./mode/folding/fold_mode");
 exports.config = require("./config");
 
+/**
+ * @param {String} moduleName
+ * @returns {Object}
+ *
+ * provides access to require in packed noconflict mode
+ *
+ **/
+exports.require = require;
+
 /**
  * Embeds the Ace editor into the DOM, at the element provided by `el`.
  * @param {String | DOMElement} el Either the id of an element, or the element itself