~Used just like an attack box declaration but when it hits an entity, the entity using itembox will be picked up.
~This allows for touch items that are floating in midair as well as better touch item capabilities than subtype touch.
~Probably don't put it in any entities that are not items.
Also, "weapon" for both changeentityproperty and changeplayerproperty has a new flag: put 1 after "weapon" to retain the entity's current animation after switching weapons. Currently, switching weapons in midair will make the player go idle until they hit the ground so that is why this was implemented.
