cleanup whitespace
add dev to version name
rename local variables with correct casing
limit debug levels
improve documentation
use Debug level stored in shared preferences in About window
create Debug class
exit when context is not set
use Debug class
use Debug class in LocationService
don't call a Debug method if it is not instanciated;
assign Debug instance to class property
use Debug class instance in Ariadne_Location
remove unused constants
use Debug level preference name constant in SettingsActivity code
update docs