scripting improvements

Reworked some of the scripting on map1 to count wipes better.

Fixed some nav issues on map 4, so infected can get into the train cars without climbing onto the roof by accident.

Minor changes to map1, trying to fix the floating car window prop issue. Map 5, added more tents to the play area, to give infected more things to block LOS for spawning in scavenger mode.

Fixed lighting on the road in map1 to be less pitch dark. Updated graffiti on map2,4,5. Fixed item spawning issues on map5. Fixed scavenger mode issues on map 5.

Updated map 5. Improved gnome room. Added scavenge game mode option/elements. Added script to prevent gnome theft when playing mutation9 (last gnome on earth) and mutation20 (healing gnome).

Fixed error on map 5 where gascans would not spawn on the first round.

map 5, fixed gas can spawning bug. Map 4 fixed getting stuck on hole in trailer end, map1 check to see if floating wrecked car glass is gone for good, testing remarkable modifications.

Changed maps 1 and 2 so the number of wipes is relavant to the starting condition scripts. Removed a car from map5 to bring under 100% entity limit. General scripting improvements.

Changeds to custom remarkables trying to fix errors. Fixed assorted random errors on all maps.