[TIMOB-2510] iOS: createDocumentViewer (UIDocumentInteractionController) is defined but undocumented

   //-----------example--------
   Titanium.UI.setBackgroundColor('#000');
   
   //creating the window
   var win1 = Titanium.UI.createWindow({
   title:'win 1',
   backgroundColor:'#fff'
   });
   
   //add window - navigation bar
   var modalWin = Ti.UI.createWindow();
   var navmodal = Ti.UI.iPhone.createNavigationGroup({
   window:modalWin
   });
   win1.add(navmodal);
   
   //button for the nav bar
   var b2t = Titanium.UI.createButton({
   title:'Launch'
    });
   modalWin.RightNavButton = b2t;
   
   //button for the window
   var b1t = Titanium.UI.createButton({
   title:'Launch',
   height:40,
   width:200,
   top:270
   });
   win1.add(b1t);
   
   //Setting up the documentviewer
   z = Ti.UI.iPad.createDocumentViewer({url:'Example.pdf'});
   
   //documentviewer with animation set on and a quicklook view poping up next to a view
   b1t.addEventListener('click', function(){z.show({animated:false,view:b2t});});
   
   //documentviewer with animation set off
   b2t.addEventListener('click', function(){z.show();});
   win1.open();