[poli-machines]

• added deleting magnets
• creating new motion setup (to insert magnets into the band)
• created own run_mag

[sadda]

@poli-machines Please do the following:

• Write a proper description of the PR. I need to understand from the description what the PR does. Check the PRs of Haitao.
• Give me some basic results from running the run_mag.py file, including the designs. We should have a function plotting the designs in Geometry, if not, write it please. If it exists, but does not include plotting magnets, add it.
• I guess there are some bugs (delete_magnets is never called) and inefficiencies (set_magnets is called twice). Give the code more care.
• Add a safety check that the magnets are not sticking out of the barriers.
• Do I understand correctly that add_rotor_magnet (from an older PR) modifies the magnets? If so, this should not be so. It is supposed to just place the materials there. Or am I missing something?

[poli-machines]

@sadda
This PR:

• plot_barrier is modified to draw not only the barriers but magnets too if they are available
• reassign_motion_setup is created to refresh existing motion_setup. It helps magnets to appear inside of the Band for correct calculation. It works like this: checking if motion_setup exits - if yes, delete it and creating new one and putting magnets inside of it.
• delete_magnets were moved inside of delete_rotor and now magnets are deleted with rotor after calculation