Add Perl to examples

Hi there. I really like your site. I found it while explaining YAML to someone in #yaml on irc.freenode.net yesterday.

I'm one of the creators of the YAML language and the author of the a couple YAML implementations in Perl. I added a Perl example to your site and got it running here: http://ingydotnet.github.io/yamltojson.com/#perl

Also if you want I have a number of suggestions for your site. I can either send PRs/Issues or we could just chat about it in #yaml. Drop by!

Again, nice work. If you're ever in Seattle, I'll buy you a beer.