Added type check to 'movedFrom' property setter to protect from bad data from server.
Added type check to 'movedFrom' property setter to protect from bad data from server.

mdittmer/foam,jacksonic/foam,jacksonic/foam,osric-the-knight/foam,osric-the-knight/foam,osric-the-knight/foam,foam-framework/foam,jlhughes/foam,foam-framework/foam,foam-framework/foam,jacksonic/foam,mdittmer/foam,foam-framework/foam,jacksonic/foam,osric-the-knight/foam,foam-framework/foam,jlhughes/foam,mdittmer/foam,mdittmer/foam,jlhughes/foam,jlhughes/foam