magicbot: tunables shuffleboard integration ala oblog

[virtuald]

I had already been thinking about something vaguely similar even before shuffleboard (though, thinking about the integration via pynetworktables2js), but this seems like it would be convenient. Haven't looked very hard at the shuffleboard APIs to see if it's even possible or a good idea yet.

[auscompgeek]

Looking at the Shuffleboard layout stuff, it looks like it only supports tables under /Shuffleboard, unfortunately. Could do a custom plugin I guess?