Add an SVG rendering sandbox to test page.
Add an SVG rendering sandbox to test page.

zky829/saveSvgAsPng,exupero/saveSvgAsPng,flamilton/saveSvgAsPng,bjpop/saveSvgAsPng,cool-Blue/saveSvgAsPng,raiyankamal/saveSvgAsPng,exupero/saveSvgAsPng,raiyankamal/saveSvgAsPng,zky829/saveSvgAsPng,bjpop/saveSvgAsPng,cool-Blue/saveSvgAsPng,flamilton/saveSvgAsPng