* New: In bootstrap/docker, paraphernalia to rebuild and check Coriolis
for Debian 9, Ubuntu 18 & SL 7 on pristine systems. Added scripts
to rebuild Alliance as well and perform the alliance-check-toolkit
regression tests.
* Change: Updated installation documentation. Added a section for docker.
* Change: In documentation, now generate the overall documentation using
Pelican instead of Sphinx. This allows to have an unified approach
between the coriolis.lip6.fr website and the local documentation.
So we keep using "only" two doc generators: doxygen & Pelican.