return -> exit

Signed-off-by: Frank Terbeck <ft@bewatermyfriend.org>
Add version tag to all scripts

The scheme is this:

  <year>-<month>-<day>.<count>

<count> being "1" per default and incremented if more than one version
is done per any given day.

All scripts accept an option "-v" to display the script's version tag.

Signed-off-by: Frank Terbeck <ft@bewatermyfriend.org>