update documentation

Author: therewasaguy

lib/p5.sound.js

@@ -1,4 +1,4 @@
-/*! p5.sound.js v0.2.16 2015-11-24 */
+/*! p5.sound.js v0.2.16 2015-11-30 */
 (function (root, factory) {
   if (typeof define === 'function' && define.amd)
     define('p5.sound', ['p5'], function (p5) { (factory(p5));});
@@ -1659,13 +1659,18 @@ soundfile = function () {
   };
   /**
    *  Schedule an event to be called when the soundfile
-   *  reaches the end of a buffer.
+   *  reaches the end of a buffer. If the soundfile is
+   *  playing through once, this will be called when it
+   *  ends. If it is looping, it will be called when
+   *  stop is called.
    *  
-   *  @param  {Function} callback [description]
-   *  @return {[type]}            [description]
+   *  @method  onended
+   *  @param  {Function} callback function to call when the
+   *                              soundfile has ended.
    */
   p5.SoundFile.prototype.onended = function (callback) {
     this._onended = callback;
+    return this;
   };
   p5.SoundFile.prototype.add = function () {
   };