Development workflow for projects in the https://github.com/sagemath organization

[Matthias Koeppe]

Let's discuss and document (in files CONTRIBUTING.md of the individual repositories) the development workflow for projects in the https://github.com/sagemath organization:

* Are contributions to these projects subject to peer review, like on Trac?

* Who is in charge of merging pull requests and making releases?

In particular:

- https://github.com/sagemath/memory_allocator

- https://github.com/sagemath/cysignals

- https://github.com/sagemath/sage_trac_plugin

- https://github.com/sagemath/sage-patchbot

- https://github.com/sagemath/cypari2

- https://github.com/sagemath/sage-numerical-backends-gurobi

- https://github.com/sagemath/sage-numerical-backends-coin

- https://github.com/sagemath/sage-numerical-backends-cplex

There are also a number of repos that look stale and should probably be archived:

- https://github.com/sagemath/git-developer-guide

- https://github.com/sagemath/combinat

- ...

[Matthias Koeppe]

A current problem: We have been unsuccessful in contacting the cypari2 maintainer.
https://github.com/sagemath/cypari2/issues/143