investigate documentation in julia from docstring

[tlienart]

• look up how to build a documentation (this tutorial seems good http://www.stochasticlifestyle.com/finalizing-julia-package-documentation-testing-coverage-publishing/)
• build it
• open issues for things that need completion

[tlienart]

bases working and included in CI (https://alan-turing-institute.github.io/PDMP.jl/latest/)

now we need to list things in sensible way following the syntax explained in https://juliadocs.github.io/Documenter.jl/stable/man/guide.html#Package-Guide-1

I believe the structure goes as follows

docs
| --- build (*)
| --- site (*)
| --- src
       | --- index.md
       | ...     

where the (*) folders should not be modified / committed etc (all this is handled by Travis). index.md is the landing page, and ... could be any sort of reasonable sorting of "pages" we want to be using.