[MOD-2241] Ti.Facebook: Support likechange event

   var win = Ti.UI.createWindow({
     backgroundColor : "#fff"
   }); 
   var fb = require("facebook");
   var likeButton = fb.createLikeButton({
       height: "50%", // Note: on iOS setting Ti.UI.SIZE dimensions prevented the button click
       width: "50%",
       objectID: "https://www.facebook.com/appcelerator", // URL or Facebook ID
       foregroundColor: "white", // A color in Titanium format - see Facebook docs
       likeViewStyle: 'box_count', // standard, button, box_count - see FB docs
       auxiliaryViewPosition: 'inline', // bottom, inline, top - see FB docs
       horizontalAlignment: 'left', // center, left, right - see FB docs,
       soundEnabled: true // boolean, iOS only
   });
   
   likeButton.addEventListener("statuschange", function() {
   	Ti.API.warn("The like status changed!");
   });
   
   win.add(likeButton);
   win.open();