[TIMOB-19759] iOS: Parity: tab listeners

   var win1 = Ti.UI.createWindow({
       backgroundColor : 'blue',
       title 			: 'Blue'
   });
   win1.add(Ti.UI.createLabel({text: 'I am a blue window.'}));
    
   var win2 = Ti.UI.createWindow({
       backgroundColor : 'red',
       title 			: 'Red'
   });
   win2.add(Ti.UI.createLabel({text: 'I am a red window.'}));
    
   var tab1 = Ti.UI.createTab({
       window : win1,
       title  : 'Blue'
   }),
   tab2 = Ti.UI.createTab({
       window : win2,
       title  : 'Red'
   }),
   tabGroup = Ti.UI.createTabGroup({
       tabs: [tab1, tab2]
   });
   
   //Should display deprecated message.
    tabGroup.addEventListener("focus", function(e){
    	Ti.API.info("tabGroup is focused ");
    	Ti.API.info(e);
   
    });
   
    tabGroup.addEventListener("blur", function(e){
     	Ti.API.info("tabGroup is blured ");
     	Ti.API.info(e);
   });
   
    //Should display deprecated message.
    tab1.addEventListener("focus", function(e){
    	Ti.API.info("Tab1 is focused ");
    });
   
    tab1.addEventListener("blur", function(e){
     	Ti.API.info("Tab is blured ");
   });
   
   
   tab2.addEventListener("selected", function(e){
    	Ti.API.info("Tab2 is selected");
    	Ti.API.info(e);
    });
   
    tab2.addEventListener("unselected", function(e){
     	Ti.API.info("Tab2 is unselected");
    	Ti.API.info(e.index);
   });
   
   tabGroup.open();