Better base_shutdown.lua

 * Add built-in support for trigger-based buttons (blue_security_trigger/red_security_trigger)
 * Add built-in support for Lua-defined security shutdown length (SECURITY_LENGTH)
 * Add built-in support for turning on/off lights, brushes, trigger_ff_clips, and trigger_hurts
 * Add some helpful team-oriented trigger definitions in base_teamplay.lua
Ah ok, thats not the ternary operator - they don't have one. That's using the binary operator for purposes it wasn't designed for (but some people use it for that anyway).

Since that same logic is repeated a few times, how about a simple function called GetOppositeTeam(string team)

then you could just do

```lua
local opposite_team = GetOppositeTeam(team)
```
?