 - added a setOpacity method, ART.SVG.Image class. Only for SVG for now.
 - added a setOpacity method, ART.SVG.Image class. Only for SVG for now.

cloudera/art,philkeys/art,philkeys/art,ThomWright/art,kamicane/art,Orangeness/art,ThomWright/art,sebmarkbage/art,sebmarkbage/art