Autoscale mode was not working with reference, i think I never checked the code, autoscale only based on last trace not ref too

added some exception testing to catch errors with the arduino and fail a bit more gracefully, and same for get_IV

Need better example files for R-T and for V-Phi

and I think I can fix it if I'm smart enough :)

Good news! I figured out how to get rid of all the stupid GUI crap. Solution is to just directly instantiate a RedPitaya object!