[hooks] major refactoring:
* they are no "proper" appobject, selected when an event is fired according to its context
* new module cubicweb.server.hook containing the Hook class and Operation class
* deprecated SystemHook and PreCommitOperation classes
* rewrite core server hooks as appobjects in the cubicweb/hooks directory
-> deprecates hooksmanager, remove hooks, schemahooks, securityhooks cubicweb.server sub-modules
-> new cubicweb.hooks sub-package
-> get back to a (somewhat) working state
"""pre 3.2 bw compat
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
# pylint: disable-msg=W0614,W0401
from warnings import warn
warn('moved to cubicweb.utils', DeprecationWarning, stacklevel=2)
from cubicweb.utils import *