Plotting functionality re-inserted

Replicated the plots that Tony was producing in his scripts, but this time called from a dedicated py file for plotting. Saves plots to IO directory, but also shows them during runtime, so that operator has an idea of module quality. Since it needs to show them during runtime, GUI backend for matplotlib is required.

Running a command like: sudo apt-get install python3-tk

Should enable these plots to be shown, otherwise the problem encountered here: https://stackoverflow.com/questions/56656777/userwarning-matplotlib-is-currently-using-agg-which-is-a-non-gui-backend-so

will come up. Always open to change interactive plotting to a different implementation if required.