* Added creation of /user/media/app/alarm
directory that will be used to store
custom alarm sounds.
* Implemented new database structure.
* Adapted Alarm, Bedtime, Pre-wake up and
Snooze to new database structure.
* Added removing custom alarm files during
factory reset.
* Added fallback alarm sound mechanism.
* Cleanups, unifications.
* Modified Lua update scripts to show simple
progress bar during update process in
Recovery.
* Fixed regression with failing factory
reset on Pure.
* Split Lua scripts per product.
Added checking if requested to restore backup
from pre-UDM version and setting db versions
to zero in such case, as version info file
(called backup.json in legacy backups) doesn't
contain info about versions.
