Use Documenter.jl for the documentation

[giordano]

We should use https://github.com/JuliaDocs/Documenter.jl for the documentation

[jakubwro]

This week I have time to work on this. Can I take the task?

[giordano]

Wow, thanks for volunteering. Actually my idea was for a Google code in student to take this, so maybe let's see first if any of them is willing to do this task 😉

[jakubwro]

Sure :)