Enigma Source (svn, archived)

- st(grp), it(grp), fl(grp) allow group as argument, returns the result group
- seperate wire impulse handling from stone::on_impulse as propagateImpulse()
- integrate wire flag into Impulse structure
- Rotator: if movable then propagate wire impulses
- RubberbandStone reengineering:
- rename to st_rubberband
- adjust attribute "minlength" to "threshold"
- add attribute "max" ("min" is not supported )
- propagate wire impulses if hit with wand
- do not accept wire impulses
- ScissorsStone reengineering
- rename to "st_scissors"
- fix Pull stone crash