The Backpack (Inventory system)

uploaded content to workshop

Essential update.

1. Missing some checks i forgot to add, so most code ran shared and caused lua errors.

Note: It is very important you update to this version.

1. Renamed the entities.
2. Renamed the swep.
3. Implemented the new folder structure.
4. Organized some of the code.
5. Optimized some of the code.

Note: Advanced Backpack System will be out soon, which will replace this.

1. I added a isvalid check to the removal of the backpack, sometimes it try to remove a backpack that doesn't exist, in worst case could result with some lua errors.

-Fixed the damage made by an overly active keyboard

1. Added a new chat command to open the backpack, type /backpack in the chat.

1. Fixed vector being offset on most models.
2. Added a config option, so you can adjust the vectors of the backpack.
3. Added a new sound api for the item pickup tool.

1. Fixed a small lua error, which was related with the safe upgrade entity.

1. Fixed a bug which broke the bag, and wouldn't allow people to drop items.

1. Fixed a font lua error, that often emitted when you spawned the backpack upgrade kit.

1. Optimized server side code.
2. Organized code to make it look better.
3. Fixed lot of bugs.
4. Renamed quite few variables, so it look more smooth.
5. Created an entity for the backpack itself, so it can be sold from the f4-menu.
6. Changed, so you can spawn the backpack through the store.
7. Did so you now can save the safe in the backpack, without losing owner.
8. Blocked safes from storing eachother.
9. Removed /backpack and /save function.
10. Added a swep, where you from now on will open the backpack from. (right click to open the backpack and left click while looking on an item to store it)
11. Removed code that isn't needed anymore.

Fixed the bugged backpacks. For real this time.