Add resistor's parameters tc1 and tc2 to ngspice

[Radvall]

I noticed that some people find it more convenient to change the parameters of passive components (resistor, capacitor, inductor) in the window 'Edit Component Properties', rather than using red components and specifying parameters in text.

I did some research on what parameters of passive blue components are supported to work with ngspice:

capacitor:

Parameter	ngspice
capacitance in Farad (C)	✔
initial voltage for transient simulation (V)	✔

inductor:

Parameter	ngspice
inductance in Henry (L)	✔
initial current for transient simulation (I)	✔

resistor:

Parameter	ngspice
ohmic resistance in Ohms (R)	✔
simulation temperature in degree Celsius (Temp)	✖
first order temperature coefficient (Tc1)	✖
second order temperature coefficient (Tc2)	✖
temperature at which parameters were extracted (Tnom)	✖

Inductor with Q

Parameter	ngspice
Inductance (L)	✔
Quality factor (Q)	✔
Frequency at which Q is measured (f)	✔
Q frequency profile (Mode)	✔
simulation temperature in degree Celsius (Temp)	✖

Capacitor with Q

Parameter	ngspice
Capacitance (C)	✔
Quality factor (Q)	✔
Frequency at which Q is measured (f)	✔
Q frequency profile (Mode)	✔
simulation temperature in degree Celsius (Temp)	✖

Thus since most of parameters for inductor and capacitor are supported, then they should also supported for the resistor, which is not true.

And although this has already been discussed in the #193 I decided to add parsing temperature parameters for resistor. Also I added a comment 'Qucsator only' in the parameter Description for parameters that are ignored by Ngspice.

Simulation results for blue and red resistors are shown bellow:

[ra3xdh]

Thanks for the contribution! Merged.