correction of t_min to [20seconds]
correct t_min parallel to BOLD.m
correct keep_frames function algorithm and parameter cut_percent
correct imagesc axis
check ds one more time
adjust parameter T to each function
implement T and cut_percent
correct analag=False in butter functio
an exercise to get fast fourier transform of signal
fft just after python butter function
change ds to 2.3
cleanup fhn_timeseries(simfile)
minimize  fhn_time_delays output
calcBOLD.py: we don't need to remove v-columns anymore
calcBOLD.py: infile must be used only one time!