Cleaning up the graphs

[Mort]

I don't know how many of you even use the graphs at the moment, but I've just added some code so that anyone who has scored less than 100 points in the last 3 weeks will not be graphed. This is just to help neaten things up a bit.

All the data is still being tracked and recorded, so when you next score >100 over the last three week period you will return in all your glory.

[Mort]

Due to our current lower scoring in BF2142, You only need to have scored 5 points in the last 3 weeks to appear on the graphs.