- Corrected attributes in lots of levels and ralf_sokoban.
- Small rewrite of duffy130, as triggers may now delete themselves.
Todo:
- Check for correct type of attributes (e.g. strings instead of
integers, integers instead of boolean, FALSE/TRUE instead of
false/true)
- Remove loop-attribute everywhere (it was defunc before).
Note:
- Further development of API2 will need another level-repair round.
