change of notifications and default parameters
checks for repository collisions between calliope and other folders
minor: improved initial loading time, changed check_registration handling
minor: fixed handling last-file as input (-1, -2 etc).
minor, added: switches to save and re-use loaded video files
minor: add calliope integration
loads/checks existing registrations within a specified date-range,
added tungsten to check_backup.m
added tungsten as a backup location
correted date display bug
