[BUG] Tutorial 5 with old matplotlib args

[mtezzele]

PyGeM/tutorials/tutorial5/tutorial-5-file.py

Line 49 in c2895a1

ax.set_aspect('equal','box')

NotImplementedError: Axes3D currently only supports the aspect argument 'auto'. You passed in 'equal'.

Side note: I think we don't need the get_ipython in the .py version of the tutorial.