Fancy web interface for samples

This is based on my personal experiences. When I got a new php app or lib, I usually look at examples folder using my webbrowser before I look at the documentation. I will spend more time studying the app/lib when I found that their samples look good.

So, in order to attract people to use PHPWord more, I submit this pull request, which is an enhancement for our samples folder. People who are using CLI won't find any difference, but people using webbrowser will got an exciting first experience with us.

Please spend time to see my suggestion using your webbrowser.

Thanks.