`.Axes.get_position` now returns actual position if aspect changed

`.Axes.get_position` used to return the original position unless a

draw had been triggered or `.Axes.apply_aspect` had been called, even

if the kwarg *original* was set to *False*. Now `.Axes.apply_aspect`

is called so ``ax.get_position()`` will return the new modified position.

To get the old behaviour, ``ax.get_position(original=True)``.