Fix output messages in console

Fixes:
1. show time remaining in system console after each minute;
2. correct form of minute(s);
3. show info "everyone died!" instead of "team SPECTATOR has won
the round!" in demo mode;
4. show correct info to which team (name) was player forced, when player1
is spectator.
Add the clock to scoreboard and change clockdisplay

Commit shows time in format mm:ss in scoreboard, instead of
"X minutes remaining" info.
It also enables the clock default on the HUD and adds "clockcount"
variable which let to choose between counting forward or backward
in the clocks.

DOCREF clockdisplay clockcount