add example: PGN viewer

[oakmac]

[siansell]

I created a basic PGN viewer here with chessboard.js and chess.js at https://github.com/siansell/pgnviewer, could be useful to you?

Thanks for a neat library, I started writing something like this myself a year or so ago but didn't get very far!

[oakmac]

Very cool; thanks for sharing :)

[Tpimp]

Please check out http://engineer4hire.com/OLGA