Various changes

Rewrote ATM to use net library instead of usermessages. Fixed cocaine
resetting speed to wrong values. Added vending machine and support to be
automatically spawned like ATMs. Refactored police arrest/wanted code.
Wanted is now networked so reasons can be displayed. Added 4 vending
machines to rp_evocity_v2d_updated. Fixed a bug in parkour skill so
gravity isn't constantly set (breaking low gravity weed). Renamed
sv_arrest to sh_police. Added police menu to F3 (#47). Added new utility
command 'getentpos'. nodropweapons now uses settings system. Fixed a
minor bug in sv_policekill. Fixed 'bailcost' not being set. Added drugs
mod to requirements, though it's only really needed for clients and
could be sent by server. Fixed #51.