Improvements to the simulator

[failiz]

The main modifications:

• Be able to see the spice field in the inspector (only if it not empty)
• Created a simulation bin with items that can be simulated
• Added more items and spice fields to parts in other bins (mainly resistors, capacitors, transistors and potentiometers from Sparkfun bins)
• Fix some spice models that produce odd results
• Improved simulator error handling
• Changing parameters in the parts, triggers a simulation if the simulator is active
• Updated font of the multi-meter to a 14 segment font, now using power prefixes (p, u, m, k, M, G)

TODO:

• Create examples
• Make intensite of the LEDs more noticeable
• Add more items: RGB leds, gates, op amplifiers
• Trigger simulator if wiring changes or a part swaps
• Add interactive elements (potentiometers, switches)

[failiz]

And the last commits added:

• Created examples
• Make intensity of the LEDs more noticeable
• Trigger simulator if wiring changes or a part swaps
• Fix small bugs and small improvements

I think the simulator is ready to be merged, but let me know if you find something that needs to be modified. I will not continue improving it for now. There are a few things that I would like to implement when I find time, but they are not urgent and do not affect the core of the simulator:

• Add interactive elements (potentiometers, switches)
• Add more items: RGB leds, gates, op amplifiers

I also updated the README to reflect the last changes.

[failiz]

Released in 0.9.10. Closing