Started work on updated GUI plots

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
GUI plots now are particular to the family of the machine (no valves for scroll for instance)

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
removed functions to allow for pickling of isentropic nozzle for scroll (picklability no longer needed)

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Completed pressure profiles for scroll and tested with range of Vratio

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>