This is the PR for Perl in json2yaml

See: http://ingydotnet.github.io/jsontoyaml.com/#perl

I am creating this PR from the command line using: https://github.com/ingydotnet/git-hub

You can do almost all github stuff from the command line this way. I commented
on the previous PR that way etc.

Anyway the `git hub pull-request` command is new so hopefully this works
without a hitch.

Fingers crossed.

I can add examples in other langs like Java and Haskell when I have some free time.

Drop by #yaml at some point.

Cheers, Ingy