Treason Playtest update

Changes since last playtest build to be tested:

- Fixed round end panel showing kills from previous round, if you've made a kill after round ended but before round restarted
- Fixed spawn points being disregarded as valid if they were within 128 units of each other
- Fixed missing "player of the match" stat on round end panel
- Changed UI color for Traitors
- Added fail message for admin menu
- Made round end panel lower
- Updated all maps
- Fixed missing crosshair when spectating
- Updated scoreboard design
- HUD weapon selection now shows in Info Room
- A match of Treason can no longer be started in Info Room
- Renamed "body_found" game event to "role_revealed"
- Scoreboard now shows only the most important events, as opposed to every one
- Fixed broken ADS in/out animations with empty clips
- Fixed slow crouching speed
- Changed headshot damage multiplier to 2.0 (previously was 1.55)
- Changed first blood behaviour: by default, the first blood event is now replaced with a first body found event, that will trigger when you find a dead player body for the first time. Use t_firstblood_event_enabled 1 to enable first blood event back
- Added Zombie Taunt voice command
- Decreased movement speed of all weapons
- Updated ADS recoil modifier for some weapons
- Updated hint texts to be shorter
- Fixed one missing Heavy death voice line
- Added separate use (oi) sound for Zombies
- Added HUD aspect ratio lock (16:9 by default), use hud_limit_aspectratio to switch between no lock, 21:9 lock, 16:9 lock, 16:10 lock and 4:3 lock