Improve simulation support

[dvc94ch]

• port eispice to python3
• add python models for ideal parts
• add support ibis model
• generate testbenches (psu, input-vector)
• add biasing assertions/measurements (v, i, p)
• add assertions in time-domain
• add ac simulation to eispice
• add assertions in frequency-domain
• add CPL part models
• mixed signal simulation with pyhdl