Add new version containing own creation of an alternative chess set with SVG images.

As discussed on https://lists.sourceforge.net/lists/listinfo/p4wn-chess

Here I am adding a new version containing own creation from scratch of an alternative chess set with SVG images. License is mentioned in each graphics as RDF metadata to be cc0. Since the HTML files are supporting an offline.appcache you might first clean the cache before trying out the HTML from any hosting gh-pages branch, e.g. in Firefox go to Options -> Advanced -> Offline Web Content and User Data . Here you might want to select a Clear Now first. Still you can start browsing local HTML files, too.