Capture the Falg by irons

This script adopts W'rkncacnter's CTF script to the newer API. See the readme, the original CTF script, and the Magenta Filter maps for more information.

This release hopefully fixes out-of-sync issues. It also adds messages for all flag statuses (taken, dropped, returned, scored). There are also screen faders for these events. Finally, the alert sound no longer plays if a player is constantly picking up his own flag (i.e. when it continuously respawns on the base polygon).

I highly recommend updating to this version.