Made gPlayerData private, removed gPlayerBitData

gPlayerData is now renamed to ply_Data and made private to
"Core/Player/Core.pwn". All interactions across scripts have been
replaced with Get/Set function calls instead of direct variable
addressing.

Moved alias code to a separate file.

Altered admin code, admin variable is now private to
"Core/Admin/Core.pwn" and interactions are done via functions.

Added TogglePlayerAdminDuty and emptied the Duty.pwn script.
Minor fixes to locksmithing

Locksmithed vehicles were accessible by using a locksmith kit on them,
this is now not possible.

Added feedback messages that tell players why they can't locksmith a
vehicle.