Add UNSET command. Passing ALL removes all user-defined vars, can also u...

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...nset specific variables. Implements #261. Readme updates are in #203.

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Should a reboot clear locks and user-defined vars?

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I agree that we should fix the underlying issues. I can't think of a good solution thus have been waiting for Nivekk to come back.

I should probably clarify and say the clearing would happen on a manual reboot. I think of the reboot command as a hard cycle where it returns the original state of the machine. Shutdown saves the state as it's safe. I can see issues where you shutdown and then reboot. You want the state after the shutdown and get a stock machine.

Saying all that, the REBOOT and SHUTDOWN commands seem rather useless. I have only used them to test clearing locks/vars. I can't think of a reason you'd ever use them in a script.

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How'd you start it back up? I know that you can toggle power, you could do that to shutdown. A PAUSE/RESUME would be more useful but i haven't fully worked that out yet.

The current issue with the parsing is that it has no idea what the saved vars are thus sends it through Expression. So you save a number as scientific notation "1E-50" and it trues to subtract 50 from E. I had one test branch that added nodes under variables for the types and added all the applicable vars to those. I abandoned that for some reason that i can't recall. I'll try to find it.

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No, only user-defined variables. REMOVE ALL NODES is in planning for removal of nodes and need to think about unlocking TARGET. I am holding off on the non-critical bugs until @Nivekk gets back as to not totally overwhelm him.