lf improvements

lf improvements

fix noralsy demod bug (st should be true)
fix sprint_bin_break bug (didn't print last bit)
add a function to save/restore demodbuffer
remove redundant countFC call in PSKDemod
clean up pskclockdetect functions
fix indala26decode bug (end of data sometimes not correct)
improve PSK detection / demodulation
improve NRZ detection
improve t55xx commands & fix a few bugs
add t55xx page1 detection - added it to lf search
added experimental t55xx testmode write