Prevent detection of traps on unseen squares
Gave horn to both scooter vehicles,

replace tabs with spaces.
Made sound of moving rc car translatable.
Play vehicle stereo even with turned off engine.

Added energy consumption to vehicle stereos.

Replace player-nearby check with checking result of game::sound.
game::sound returns true when the player actually heared the sound (includes check for deafness).
Add scrolling with page up/down in help window.
Display total/used volume of cargo part when examining.