Tuto display

[sjourdro]

I finished the tutorial on displaying images.

The links are all correct.
The commands work and the code examples give the expected results.
I am not totally sure on the explications I gave however.

Please review it and give your impressions.

@fspindle @rolalaro

[rolalaro]

@sjourdro please address my preliminary comments

[rolalaro]

@sjourdro when you link towards a Python class, you should use:

:py:class:`~visp.core.Display`

instead of a link towards the online documentation, it permits to work with local files only.
The ~ indicates to Sphinx to only display the class name instead of the full denomination.

You can also link towards a function such as:

:py:func:`visp.python.display_utils.get_display`

in this case I would suggest to keep the full denomination.

See this post to link towards a method of a class.

Thank you in advance for applying the required changes =)

[rolalaro]

The links are now correctly using Sphinx cross references, and the Python code have the expected behavior. Well done !