Export viewport as SVG and/or PNG

[patrick-koenig]

(suggested by Armin Scheben)

One advantage of visualization of relatively raw data like SNPs is that it can reveal patterns that are less obvious in other types of data exploration. To fully take advantage of this tools like Jbrowse allow export of the browser window in SVG format, allowing users to incorporate images into high-resolution figures. It would be nice if DivBrowse also had an SVG export function.