Improve behaviour when no workflow
Change request Event V0
Preparing the Rule Change Request
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