Support for KitKat secondary extrnal storage, and a button in menu to add a file to a media library

More info about how KitKat treats SD cards:
http://www.androidpolice.com/2014/02/17/external-blues-google-has-brought-big-changes-to-sd-cards-in-kitkat-and-even-samsung-may-be-implementing-them/
This should also go into update datase