Enigma Source (svn, archived)

- fix actor nearest object attribute evaluation
- group add method "sub()" for retrieving a subgroup:
- group:sub(+n) - positive number gives first n objects
- group:sub(-n) - negative number gives last n objects
- group:sub(s, e) - range of objects in given index range
- group:sub(s, -n) - n objects starting with at index s
- Sensor:
- fix perform action value
- add attribute "exit", default false, if true send action on actor leaving
the grid instead of actor entering the grid
- exit attribute is substitute for no longer existing it-changefloor
(set floor beneath as the target to toggle fl_yinyang, use nearest target)