use mkaurball instead of makepkg

Signed-off-by: Nico Schottelius <nico@freiheit.schottelius.org>
Cosmetic
Fix comment
Fix style typos in type's doc
Fix formatting of manifest doc
Explain in the doc how to create a global dependency
Add types __package_{update_index,upgrade_all}
Merge branch 'type-upgrade-packages' of https://github.com/jimenezrick/cdist
remove obsolete .version file

Signed-off-by: Nico Schottelius <nico@freiheit.schottelius.org>
release 3.1.8: allow users to upgrade their packages

Signed-off-by: Nico Schottelius <nico@freiheit.schottelius.org>