os.reboot() and os.shutdown(); term.keyboardId to control which keyboard's input to listen to; added network "visibility" flag for nodes, controls which other nodes receive connect/reconnect messages from them; some more validation of network node validation (i.e. not sending to / receiving from nodes with address < 1 or visibility == none); fixed margin rendering for screen gui; always injecting the address of a sender for a signal received via the network; fixed item localization; made computers start/stop/queryable via network; major overhaul of multi-threading in computer class, not relying on future.cancel anymore (which apparently didn't interrupt running threads even though it should have) and centralized the state switching a bit (no longer any in signal() for example). removed the saveMonitor (if someone calls us from something other than the server thread its their fault).
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