Issue1049 tutorial

[Mathadon]

@damienpicard can you review and merge this by the crash course?

[damienpicard]

@Mathadon this looks good. I just have 2 small remarks:

• In example 4, you create an Occupancy model. It is unusual to create a model within a model. Are you sure you want that in a tutorial?
• In example 5: you do not include solar shading nor occupancy. Wouldn't it be nice to add them? I 'm fine with both.

Once these comments are answered, this can be merged.

[Mathadon]

1. Is deliberate, to show that this can be done. It also helps keep the library clean for the purpose of this example. Otherwise, that occupancy model would always show up in IDEAS.
2. Mostly because it's double work for the students, which I myself always find annoying.