Create Documentation based on Documenter.jl

[tknopp]

I think we should move the documentation to a Documenter.jl based approach. The docs of the Python Gtk bindings (https://python-gtk-3-tutorial.readthedocs.io/en/latest/install.html) are pretty good in my opinion and it might be a good idea to organize the docs in a similar way.

[tknopp]

I will go ahead and push some initial stubs. As one can see here: JuliaDocs/Documenter.jl#392 Gtk.jl already pushed Documenter.jl to the limits

[tknopp]

I have not enough rights to setup Documenter.jl (i.e. add the public keys) to Github. Help? @timholy @vtjnash @tkelman

[tkelman]

I raised your permissions to admin on this repo

[tknopp]

Thanks Tony!

[tknopp]

Wow, its working: http://juliagraphics.github.io/Gtk.jl/latest/
This is my first time experience with Documenter.jl and its just fun.

[vtjnash]

Wow, that does look spiffy!

[tknopp]

Well, its just Documenter.jl doing all the work. But I would like to take this as an opportunity making the docs of Gtk.jl better, especially for beginners. But at the same time we should think about some API streamlining (#274).

[tknopp]

this is basically done now. Needs some fixing though

[giordano]

This can be closed