More file/code cleanups

Improved vehicle UI, damage is now shown as different colour states
instead of a gradient which was harder to interpret.

Moved Overheat code to a separate file.

Moved Tow Truck code to a separate file.

Changed MAX_SERVER_UPTIME to 5 hours.

Made item "Meat" give 75 food points.

Moved Autosave code to a separate file. Much improved the code to now
balance the file-write load over time rather than saving it all at once.
This was causing lag spikes in the server when 200+ defenses and 250+
safeboxes were in the world.

Moved food points update code to "/scripts/SSS/Food.pwn", cleaned up
code a little, added a global idle hunger rate value.

Disabled dropping of default clothes.

Made handcuffs drop off a player who had them.

Moved all item ID variables to main code, this makes the item script
include lines more flexible, they can be included anywhere now even
under gameplay mechanic scripts (Which logically should take priority)

Removed file "misc.pwn", as all item variable declarations are in the
main code.

Added more survivor loot spawns to San Fierro.

Improved anti-cheat code, it now reports players using the report
system. Weapon hack detection added but still being tested.
More debug filterscripts

test.pwn spawns some extra stuff. It's just for testing the overheat and
towtruck code, as well as the new vehicle UI.