Nexus Network

Changed

• Asking a terminal for a crafting plan no longer holds up the server. The plan is worked out in the background and
  shows in the order window a moment later; asking again while one is being worked out replaces it, and closing the
  window stops it. Asking again within a few ticks of the last request is ignored.
• Large networks are rebuilt faster, in particular a network that reaches into a chunk that is not loaded.
• A block lent to the network by an External Vault is read again only as much as it needs when nothing in it changes.

Fixed

• A terminal no longer fails to update when a network with a very large number of different items changes all at once.