Centralize documentation
Issue generated from Tuleap's migration script. Originally submitted by: Alexandre Viau (aviau)
Documentation is currently scattered across all repositories. This made sense when there was no ring-project repository but now that we have a central repository it should be used to gather documentation.
This will improve the new contributor experience because they won't have to search across all repositories to find the information that they need.
Switching to another format like RST (+sphix) would also improve the new-contributor experience because the users would be able to browse it in a web browser.
When this is done, the wiki could be removed. It currently duplicates information that is already available in the different repositories and is at risk of getting out of sync.