docs: use DocumenterCitations

[rfourquet]

DocumenterCitations.jl uses Bibliography.jl to add support for BibTeX citations and references in documentation pages generated by Documenter.jl.

Cf. #311.
This PR adds a dummy reference in a bib file, which is referenced from a docstring or from the documentation in an .md file.
If someone wants to provide a real citation (maybe @wdecker or @GDeFranceschi have one?), I will replace the dummy one.

[GDeFranceschi]

DocumenterCitations.jl uses Bibliography.jl to add support for BibTeX citations and references in documentation pages generated by Documenter.jl.

Cf. #311.
This PR adds a dummy reference in a bib file, which is referenced from a docstring or from the documentation in an .md file.
If someone wants to provide a real citation (maybe @wdecker or @GDeFranceschi have one?), I will replace the dummy one.

A reference I will use for the documentation will surely be:
Taylor, D. E., Pairs of Generators for Matrix Groups. I, The Cayley Bulletin, 3 (1987).
Anyway, I will add most of my references once the branches involving weird algorithms are merged to the master branch.

[fingolfin]

@GDeFranceschi can you provide a bibtex version of that ref? Alternatively I guess mathscinet can produce bibtex

[GDeFranceschi]

I did not find the article on MathSciNet. I produced something like this:

@Article
{Tay87,
author={D. E. Taylor},
title={Pairs of Generators for Matrix Groups. I},
journal={The Cayley Bulletin},
volume={3},
year=1987,
pages={76--85}
}

[rfourquet]

I updated by removing the dummy citations, and added the bib entry provided by @GDeFranceschi . Citations can be referenced via something like [Tay87](@cite).

[fingolfin]

Thanks, useful! @wdecker this allows you to do bibtex references as you asked for

[fingolfin]

@GDeFranceschi you can add any other refs now and cite them (e.g. add your thesis!)

[GDeFranceschi]

Sure, I'll add them in the branch ManualGroups.