Add PlayerStatsHTMLParser, for parsing player stats

Continuing the way we parse the maps now, I made a class which will parse the player stats in a similar way. Just use MatchLoaderThread (should actually be renamed) to get the source of the page and let the class do it's work. For the refreshing of kills, deaths and kdr's I would suggest keeping track of kills and deaths but updating them from the server every once in a while, for example every 4 minutes.

I also added a sample gui (very plain) which you could use together with a background png:

![Naamloos](https://f.cloud.github.com/assets/3594254/404854/d50fca7e-a98a-11e2-8a7f-808aa60c38bf.png)