packager.sh updated to manage multi-package builds and tests
standalone postinst: missing var definition fixed
group creation moved from standalone to common package
some log added
add openquake.cfg as config file
celery user and group creation during installation added
update descriptions of packages
typo fixed
packager.sh: add log to pkgtest target, read-write access to git remote is now managed
DEVELOPMENT COMMIT, FIXME
Merge branch 'master' into 'multi-package' branch
wrong configuration file management fixed
add cd in celeryd init script in the 'status' case
move celeryconfig.py to /etc/openquake
removed development stuff and a wrong information about how to use celeryconfig.py