Added 'team' field to CSV

Records which team (1 or 2) the player was on. This allows for easy
calculation of team stats.

See short discussion here: http://www.reddit.com/r/TagPro/comments/2d5kk3/request_for_an_update_to_catstats/

I've checked with various scorekeepers and gotten the go-ahead from all of them.

It would be great if the extension in the chrome store could get this update too.

Thanks!