Changes in how the check presence timer is implemented.
	modified:   platforms/android/AndroidManifest.xml
	modified:   www/controllers/LoginController.js
	modified:   www/controllers/MainController.js
	modified:   www/directives/CheckPresence.js
	modified:   www/public/app.js
	modified:   www/services/LoginService.js
	modified:   www/templates/main.html