Fix : (reported by: Rémi BUISSON)
Fix : oups I forgot a part in the last commit. This fix the "too much notification" bug after a restart, and also a potential bug for hosts downtimes overlap.
Merge branch 'master' of github.com:naparuba/shinken
Merge remote-tracking branch 'upstream/master'

Conflicts:
	shinken/objects/schedulingitem.py
merge with upstream