I figure sooneror later we'll have more of these docs, hence let's give
them a clean place to be.
This leaves NEWS and README/README.md as well as the LICENSE texts in
the root directory of the project since that appears to be customary for
Free Software projects.
A README.md allows us to include a badge for the current build status of
Semaphore CI. Keep other information in this file minimal, and avoid
information duplication but point readers to the official README.