Two new commands
* Timeout: Calls a timeout. All play is frozen.
* Timein: Calls a timein with a 3 second countdown (3..2...1...GO!)
One new server variable
* sv_timeout: How long the timeout lasts before automatically timing back in. Default to 120 seconds
* sv_timeouts: How many timeouts a particular player gets per match (or until we implement cpma-style matches and rounds per bug 238, per map)