+ Added a console command (mcitem_dropall) to drop all of your weapons.

fixed an error

+ Fixed a save issue

Fixed an issue where configs wouldn't save.

+ added mcitem_deathdrops_activeonly

ConVars now are saved in garrysmod/data/mcitem_config.json.
Use mcitem_saveconfig 0 to disable this behavior.

Fixed issue where errors would occur upon killing an NPC that doesn't have a GetActiveWeapon() method.

Items that would have been a battery model (null/removed weapon) are now removed.

* Fixed ArcCW weapons not displaying correctly (they still may look weird but its better than nothing)
* Greatly improved performance involving NPCs

Fixed NPC pickups so they (hopefully) can't pick up more than one weapon