fix crash in preferences on old backups. change scheduling layout.
reference to logfile in notification when error encountered
revert error message in notifications
use busybox for mounting when restoring system apk
update translations. add german translation.
new version 0.2.5
added option to change language
reorganizing files
update changelog
smarter handling of default value
handle language change in preferenceactivity
show errors in ui
collect creation of backup directory in single class
update german translation
keep chosen language on configuration change
package name in error output
add hint to search