Add add'l item details to export

[Jascen]

• Adds "Quantity" to help capture the amount of runes/gems/etc in a stack.
• Adds "location" to help identify where the item is
  • Handles case where the item is actually Equipped but it's location is NULL.
  • Other cases of NULL include if the gem/rune/jewel is inside of a socket, the property is skipped in this case.