Update question1.pl

Not sure if this will add it to a new branch/file or not...this is the first time I've forked someone else's project, so I've added my solution to the bottom of yours. I'm reasonably new to github so let me know if there is a better way I can add new files to a repository.

I actually thought of sorting the list in ascending order as you've done, but I read iterate in the tute question and figured I'd just use a plain old for loop.