[oaradmissionrules] bugfix
[quota] fix issue in parallel algo

Remove find_first_hole_parallel in the GanttHoleStorage_with_quotas.pm module.
[database] [admission rules] add priority and enabled fields to database
[admission rules] adapt scripts/libs to the db changes
[API] update code to work with the new admission rules schema
bump version
[oaradmissionrules] debug #id add_admission_rule
[oaradmissionrules] better handle -new and --edit command

--new now fall back to --new --edit if neither --edit nor --from-file
was there.

--edit now tries $EDITOR, then editor if it exists (Debian), otherwise,
in last resort, vi is hardcoded.
[config] update default configuration settings
[doc] update documentation
[doc] db scheme update
[makefile] drop drawgantt and oaradmin from make packages-*

Those lines applies to `make packages-install PACKAGES_DIR=...'.

Without removing the drawgantt related lines, drawgantt was still
shipped with oar-web-status RPM, and ruby was automatically added as a
dependency.
[tests] moved Vagrantfile to the tests directory
[oaradmin] remove oaradmin rules command to avoid anyone to report bugs with it, and fix man page
[changelog] update + tidy changelog
[api] Bugfix (typos)
[kameleon] updated oar_devel_git2debian (now qemu_oar_devel_git2debian)

Also created directories for each recipe and updated README