Harmonic filtering improved. Now only local maxima in the spectrum on…

… CH1 are used.

Auto setup now tries to set the timebase such that multiple periods are captured
Demo mode added. No scope needed: python dho-remote.py -d examples/LRC.bplt
Installation instruction added

Loopgain analysis added

FFT window selection menu added
Selection algorithm for Bode points optimized

Phase unwrap uncommented

First version