Represents a disc in wich entities can be teleported.
Entities are
teleported on a random point within the zone.
name : name of the
zone. 2 ZONES CANNOT SHARE THE SAME NAME.
radius : radius of
the delimiting circle in meter
use_z : if checked, the z property will be used
z : z cords of
the disc
Angle : heading of
entities after teleportation