Added player statistic charts

I combined the data from http://openra.ipdx.ru/graphs.html with a modern AJAX interface from http://javascriptrrd.sourceforge.net/docs/javascriptrrd_v1.1.1/src/examples/rrdJFlot.html

![image](https://cloud.githubusercontent.com/assets/756669/5158272/3779aafa-7337-11e4-978b-57c12cd6b6b0.png)

![image](https://cloud.githubusercontent.com/assets/756669/5158273/499554c8-7337-11e4-9e0e-785f6df22a1b.png)

![image](https://cloud.githubusercontent.com/assets/756669/5158274/559702e4-7337-11e4-8a63-300e83401088.png)

![image](https://cloud.githubusercontent.com/assets/756669/5158276/62e2b29a-7337-11e4-84c3-0188480de7dd.png)

The options have been reduced and I chose some sane defaults to render readable graphs. The statistics are linked from http://www.openra.net/games/ and use the same color theme.

Pro-Tip: You can hover of the graph and also zoom in with the mouse.