Fixed a major issue - you no longer stay alive forever when you've got a full laser charge...

Also added the cheat "kiosk" - which enables "kiosk mode", which plays the trailer if there has been no input for more than 10 seconds. This is because Polyfury is being showcased in person this weekend, and it's boring to look at a menu screen when nobody is playing ;)

Incredibly minor patch that fixes a bug where the laser no longer restores a life, and I've widened the laser life restore timing window.