* use filesystem api to store database content
* store database on db change event but only in case there where no new event in 1 second then wait another second and store if not further event avoids to much saves for every change and collects the changes and saves at there end
* implement lib_fileSystem with a cordova and a chrome app specific part
* define dependency of db plugin to filesystem plugin 
** trigger a special filesystem init event to allow this
* make jshint happy
* activate fileSystem plugin