i Was thinking that it would be useful to have controls defined as class before passing them to the rig. what do you think?
would be something like that:
control = controls.SimpleControl():
control.set_shape('circle')
control.set_color('yellow')
control.set_size(1.2)
rig = rigs.FkCurveRig('sample', 'C')
rig.set_control(control)
rig.set_joint(...)
...
rig.create()