Modification of the Android NavigationDrawer sample to use ActionbarSherlock so that we can use the NavigationDrawer on older devices.
Orignal sample and documentation are here: http://developer.android.com/training/implementing-navigation/nav-drawer.html
ActionBarSherlock needs to be added as a library project to make this project compile. Tested on Android 2.3.7 and Android 4.2.2.