Issue#199 update - add satellite info, change DOP display, add compass rose #248
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Re: follow-up on issue #199, I changed the DOP display from a string to a 5-bar indicator which made room for displaying the number of satellites used in the fix. I added heading and numSatellites to the GPSStatus and GPS classes and the two GPS lib interfaces, though heading doesn't seem to be reported the way I expected from UBlox. I also added a "N" indicator that follows our heading on the compass for the node status frame; as far as I can tell it was already being offset from the node's heading so it's a good idea to show that the node heading isn't in reference to absolute north.