Normation/rudder-commons — pull request #2 by VinceMacBuche (2013-01-03 14:46:28+00:00)
Title: Ref #3002 : Change event log to be able to have a rollback system based on them

linked to issue http://www.rudder-project.org/redmine/issues/3076

I add the base backend to make rollback from event logs