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
The official maps that we have VMFs for we COULD change. Also for the ones we don't have VMFs for we can make such name changes by editing the BSP directly IIRC.

In case you wanted an alternative...