Freely inspired by Android 5.0 lockscreen widgetlocker by Marc22 (http://mycolorscreen.com/2013/04/25/android-5-0-lockscreen-widgetlocker/)
Details: http://mycolorscreen.com/2013/06/03/halo-lockscreen/
Details: http://mycolorscreen.com/2013/06/03/halo-lockscreen/