re #249, #250 fix up the mapguide viewer api callbacks for digitizing Rectangles to actually return a rectangle geometry.  Also avoid the toJSONString method added to Object prototype when enumerating controls during initialization.
re #249, #250 fix up the mapguide viewer api callbacks for digitizing Rectangles to actually return a rectangle geometry.  Also avoid the toJSONString method added to Object prototype when enumerating controls during initialization.

asir6/FusionLab,asir6/FusionLab,asir6/FusionLab,asir6/FusionLab