Add team count indicators

[bash-tp]

This is browncoat's script, modified to eliminate flashing in the new Tagpro UI

[wilcooo]

The script is not realy optimized, because a new container is created in every frame, and some little things like the viewport size is already stored in a tagpro variable. That said, I realy think this should be built-in to the game! (with the option to turn it off). It will be way easier to see when it is conventional to wait, and when to reset&go. And there will be less confusion about whether or not someone capped at 4v2.