Move everything into the new namespace starting with 'prosa' rather
than the bland 'rt'.

The main restructuring thrust is nearing completion, so let's get rid
of the `restructuring` namespace.

For improved parallelism and nicer documentation.

Now that we have non-ambiguous dependencies, parallel builds should
work without issue.

If there are breaking changes coming in ssreflect, it would be nice to
know early.

Pierre Roux authored 5 years ago and Björn Brandenburg committed 5 years ago

We no longer support Coq 8.8.

Marco Perronet authored 5 years ago and Björn Brandenburg committed 5 years ago

Add the `htmlpretty` target to the Makefile to generate prettier documentation,
based on the CoqdocJS project.

     https://www.ps.uni-saarland.de/~ttebbi/coqdocjs/

     https://github.com/tebbi/coqdocjs

Many thanks to Tobias Tebbi for creating CoqdocJS.

Coqdoc produces really nice output - let's automate this.

There's no need to run this for every compiler version; we only care
about the "main" version.

This avoids having to compile ssreflect from scratch each time we want
to compile Prosa.

Thanks to Pierre Roux (Pierre.Roux@onera.fr) for pointing out the
mathcomp Docker images!

From the mathcomp 1.9.0 release notes:

> removed Coq prelude hints plus_n_O plus_n_Sm mult_n_O mult_n_Sm, to
> improve robustness of by ...; scripts may need to invoke addn0,
> addnS, muln0 or mulnS explicitly where these hints were used
> accidentally.

=> This patch makes these required fixes in Prosa.

While at it, turn on CI for coq:dev and Coq 8.9 with two versions of ssreflect.

Using the official Coq Docker images kindly provided by the Coq community:

	https://github.com/coq-community/docker-coq/wiki/CI-setup

Using the following CI template as a starting point:

	https://gitlab.com/erikmd/docker-coq-gitlab-ci-demo-1/blob/master/.gitlab-ci.yml