Added very basic audio notifications.

This plays the same message.ogg/message.mp3 regardless of event type.
It also does not check the user's event settings (LOUD/OFF/etc), instead
playing a sound upon every single notification.
Clearly, it still needs some work.

Signed-off-by: Andrew Johnson <ajohnson@draster.com>

src/Notifier.js

@@ -83,15 +83,24 @@ var Notifier = {
             });
             global.focus();
         };
-        
-        /*var audioClip;
-        
-        if (audioNotification) {
-            audioClip = playAudio(audioNotification);
-        }*/
+
+        var playAudio = function() {
+            var e = document.getElementById("messageAudio");
+            if (e) {
+                e.load();
+                e.play();
+                return e;
+            }
+        };
+
+        var audioClip;
+        audioClip = playAudio();
 
         global.setTimeout(function() {
             notification.close();
+            if (audioClip) {
+                audioClip.pause();
+            }
         }, 5 * 1000);
         
     },