added argument parsing to plot_burst.py and small fix to README
added argument parsing to plot_burst.py and small fix to README
new usage of plot_burst.py, example: python3 dedisp/python/plot_burst.py /var/scratch/vlugt/fdd/data/pks_frb110220.fil /home/vlugt/bin/dedisp/pks_frb110220_DM --savePlot plot.png
use plot_burst.py -h
for options