Actually implemented getWidth in Envelope.
Actually implemented getWidth in Envelope.

Septima/jsts,weftio/jsts,circuits-io/jsts,yeyan/jsts,circuits-io/jsts,kolosov-sergey/jsts,nachoalthabe/cluster_poligonal,kolosov-sergey/jsts,Geode/jsts,Septima/jsts,Geode/jsts,Septima/jsts,kolosov-sergey/jsts,weftio/jsts,yeyan/jsts,mikeatlas/jsts,Geode/jsts,mikeatlas/jsts,mikeatlas/jsts,weftio/jsts