Changes

Summary

1. Fix initial conditions of single phase transformer models with hysteresis (details)
2. Remove protected to make magnetic transformer components accessible from outside (details)
3. Add initial condition to three phase hysteresis transformer example (details)
4. Add two more initial conditions to the three phase hysteresis transformer example (details)
5. Fix initial conditions of hysteresis comparison example (details)

Fix initial conditions of single phase transformer models with hysteresis

Remove protected to make magnetic transformer components accessible from outside

Add initial condition to three phase hysteresis transformer example

Add two more initial conditions to the three phase hysteresis transformer example

Fix initial conditions of hysteresis comparison example