Change request Event V0
Merge remote-tracking branch 'NCH/proto/workflows' into proto/workflows

Conflicts:
	rudder-core/src/main/scala/com/normation/rudder/repository/inmemory/InMemoryChangeRequestRepository.scala
	rudder-web/src/main/scala/bootstrap/liftweb/AppConfig.scala
Add Change request Event log
Restore deleted line from xml serialisation
Event log V1.0-beta
Merge remote-tracking branch 'NCH/proto/workflows' into proto/workflows

Conflicts:
	rudder-web/src/main/scala/bootstrap/liftweb/AppConfig.scala
Serializing/deserializing rules change
Merging with vincent modification