-Changed the return value from 3 to 4 for returning 4 tabs (what we need for this application) in the getCount() function -- MainActivity.java

-Added case 3 in the getPageTitle(int position) function to get the correct title for the fourth tab -- MainActivity.java

-Italian strings for the tabs -- res/layout/values/strings.xml

-Added a test placeholder in the action bar menu called action_about -- res/layout/menu/main

-Changed from an if to a switch the getItemID() resolution in the onOptionsItemSelected(MenuItem item) function, for adding more things in the action bar menu -- MainActivity.java