* fix -- warehouse will occasionally not x-mit datas (or just not
receive them properly)(client will now request datas if not present
after 1/4 second, and until it has received it)
* re-enable version checking for SMP (needs real test)
* add clear buttons for npc info lists (live list will repopulate as
entities are loaded/check in)
* add death cause/display to dead-npc tracker
* add some ability to 'copy' routing slips (if shift-right click &&
routing slip is present in next slot, copy to next slot)
* fix -- couriers/other npcs will now drop 'special inventory' on death
(routing slip slots)
* remove gui from non-courier NPCs as they no longer have inventories
(may be replaced in the future with an info GUI)
* add backpack item, container, gui, recipes
* add backpack as necessary item for couriers