Runs output are sorted by run_index (but only if all the runs have a run_index)
If pdsim_temp doesnt exist make it when main frame is instantiated

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Unique run_index read/set in config file

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Added code for saving XLSX files (not wired up yet)

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Saved eta_oi and Wdot_electrical to summary (maybe make _summary so it pops to the top?)

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