This involved splitting creation of traces from setting of trace
data.
Also renamed SIM_WORKBOOK to SIM_NOTEBOOK. This class is a subclass
of wxAiuNotebook and represents the collection of simulation plot tabs.
It is NOT the same thing as a simulation workbook, which contains other
stuff such as measurements, plotted signals, colours, etc.
This also removes a bunch of "friend" declarations.
SIMULATOR has now an Attach() method, which should be called
with proper SIMULATION_MODEL that should be simulated, before calling Run()
Concrete class of SIMULATION_MODEL for ngspice is NGSPICE_CIRCUIT_MODEL,
renamed from NETLIST_EXPORTER_PSPICE_SIM. DIALOG_SIM_SETTINGS relies
on above mentioned object, so it was added as an argument of the constructor.
Jeff Young
Marek Roszko
Sylwester Kocjan
Wayne Stambaugh
Mikolaj Wielgus
Sylwester Kocjan