[TIMOB-25672] iOS: Address 10+ compiler warnings and general issues in source project

   var win = Ti.UI.createWindow({
     title: 'TIMOB-25672 Test-Suite',
     backgroundColor: '#fff',
     layout: 'vertical'
   });
    
   var btn1a = Ti.UI.createButton({
     title: 'Test #1a (Video Player Thumbnail Generator)',
     top: 50
   });
    
   btn1a.addEventListener('click', function() {
     var video = Ti.Media.createVideoPlayer({
       url: 'http://techslides.com/demos/sample-videos/small.mp4'
     });
     
     var thumbnail = video.requestThumbnailImagesAtTimes([1], Titanium.Media.VIDEO_TIME_OPTION_EXACT, function(e) {
       var newWin = Ti.UI.createWindow({
         backgroundColor: '#fff'
       });
       newWin.add(Ti.UI.createImageView({
         image: e.image
       }));
       nav.openWindow(newWin);
     });
   });
    
   var btn1b = Ti.UI.createButton({
     title: 'Test #1b (Video Player KVO)',
     top: 50
   });
    
   btn1b.addEventListener('click', function() {
     var video = Ti.Media.createVideoPlayer({
       url: 'http://techslides.com/demos/sample-videos/small.mp4'
     });
     var newWin = Ti.UI.createWindow({
       backgroundColor: '#fff'
     });
     newWin.add(video);
     nav.openWindow(newWin);
   });
   
   var btn2 = Ti.UI.createButton({
     title: 'Test #2 (Base64-decode)',
     top: 50
   });
    
   btn2.addEventListener('click', function() {
     var blob = Ti.Utils.base64decode('dGlyb2NrcyE=');
     Ti.API.info('Decoded: ' + blob.text);
   });
    
   var btn3 = Ti.UI.createButton({
     title: 'Test #3 (List-View selectedItems)',
     top: 50
   });
    
   btn3.addEventListener('click', function() {
     var win = Ti.UI.createWindow();
     var list = Ti.UI.createListView({
       sections: [Ti.UI.createListSection({
         items: [{
           properties: {
             title: 'Test'
           }
         }]
       })]
     });
     win.addEventListener('open', function() {
       Ti.API.warn('# of selected items (before): ' + list.selectedItems.length);
     });
     list.addEventListener('itemclick', function(e) {
       Ti.API.warn('# of selected items (in selection): ' + list.selectedItems.length);
     });
     win.add(list);
     nav.openWindow(win);
   });
    
   win.add(btn1a);
   win.add(btn1b);
   win.add(btn2);
   win.add(btn3);
    
   var nav = Ti.UI.iOS.createNavigationWindow({
     window: win
   });
    
   nav.open();