Leaderboard, add filter to split infantry from vehicular kills

[Shamrock]

I wish we had a filter on the leader-board that could effectively split kills generated by infantry weapons from vehicular kills.

This would enable us to see who the truly good fps players are; and allow us to filter out/remove the cheesy lolpodders, HE tank spammers, and Lib pilots.

[Rothnang]

Yes, vehicle players should also be required to wear a big V on their sleeve so we know who they are the dirty bastards.