Added flag on some timers so we are sure they are killed on map change.
Added stop event on health regeneration timer when applying classes, if the class has no regeneration.
Cvar zr_classes_default_admin is now replaced by admin-only classes. Old cvar is zr_classes_default_admin_mode.
Fixed existing volumes not removed after a map change.
Added class editor feature that can modify certain class attributes on players in a volume.
Fixed typo in class attribute name.
Fixed health regeneration timer not stopping if a player were kicked or timed out.
