[SA] Subsections in separate files

Signed-off-by: Giuseppe Massari <joe.massanga@gmail.com>
[Biblio] references are updated
Merge branch 'gm-master' of https://github.com/muxanius/report into gm-master
Merge branch 'ma-sa-system' of https://github.com/muxanius/report into ma-sa-system