Added Items: injector item script, bandage item script, pills
improvements.

Drugs script that handles Pills and Injector effects all in one place.

Done some housework on scripts, moved the SIF weapon script here as it
had become integrated anyway.

Melee items script introduced, some parts untested but animation
sequencing works fine. The only current melee item is the wrench.

Changed autosave interval to 60 seconds, removed large amount of log
prints from autosave so it's more hard-drive space friendly. (My last
log was 500MB)

Improved drug effects, they all work fine now, time works too.

Added blackouts/knockouts/unconciousness, when on low health this can
occur randomly and increase in probability as health gets lower.

Added bleeding, can be prevented by using bandages

Fixed an exploit where vehicles could be entered as a passenger from far
away, meaning it could be abused to get into locked places such as
lockups.

Moved all item restriction code (handcuffs and admin duty) to one
script.

Added reviving for unconcious players, a medkit or bandage can be used
to revive an unconcious player.