Prevented crashes for non-existent user files

Added if(!file) checks and 0-returns for LoadPlayerChar and
LoadPlayerInventory

Moved the file loading functions to the Login() function, they were
originally in the spawn function.

Added correct checks for weapon pickup code, such as admin duty,
handcuffs and knockouts.
Improved the "/admins" command

Changed "/admins" to "/adminlist" which shows the actual list of admins
from the server memory, this is still a level 3 command.

Added command "/admins" that shows a statically set list of admins (will
change this once JSON support is added to allow for custom messages)

Added admin level named enumerated labels.
Fixed some bugs with explosives

Added correct zeroing for "bag_ContainerItem", so this value won't point
to "0" any more unless set specifically.

Added correct "veh_ContainerVehicle" assignment for
"SetVehicleContainer".

Added correct zeroing for "box_ContainerSafebox".