ItemStore - Inventory for DarkRP

1. Beta: fixed CustomItems items causing an error to get thrown on spawn

1. Added Item:Pickup( pl, con, slot, ent ), Item:Drop( pl, con, slot, ent ) and Item:Destroy( pl, con, slot ) for developers

Happy halloween I broke the fuck out of the last update

1. Fixed weapons for real this time

1. Fixed stable version weapons erroring out when used
2. Fixed stock HL2 weapons not working at all when inventoried

1. Disabled mysql.experimental temporarily

1. Weapons now obey gun licenses

1. Fixed broken mysql support in stable version
2. Potentially fixed mysql stuff in the beta

1. Removed an unused include
2. Hopefully fixed a syntax error in mysql.experimental

1. Fixed a shipment bug in the beta version

Beta changes:

1. New mysql.experimental data provider that should handle larger player bases more efficiently. Please give this a shot and give feedback on it.
2. itemstore.config.SaveOnWrite now implicitly disables periodic saving (since every save happens the moment the player's inventory changes)

1. Fixed a dupe bug with non-weapon shipments (stable)

1. Fixed an occasional bug where items would disappear when using tmysql4 on the stable branch
2. Fixed banks not properly persisting with tmysql4 on the stable branch (haha, how'd this get overlooked)