[pkg] Inline call to setup() in setup.py The point of having this "install" function, called in "main" mode is not clear. Better stick to standard practices.

etc/init.d
etc/cubicweb.d
etc/bash_completion.d
usr/bin
usr/share/doc/cubicweb-ctl
var/log/cubicweb
var/lib/cubicweb/backup
var/lib/cubicweb/instances