legacy code retreat's triva game : the D version

[marcpmichel]

I participated in the "global day of code retreat 2013", and we 
had to do refactoring on a very ugly piece of code which was 
available on many languages.
But there was no D version, so I made one (based on the java 
version) and pull-requested it.

Here is the ugly thing :
https://github.com/jbrains/trivia/tree/master/d

EOT