Generate Directive Diff using Section Spec
Call to changeRequest Repository instead of dummy CR
Merge with François

Conflicts:
	rudder-web/src/main/scala/bootstrap/liftweb/AppConfig.scala
	rudder-web/src/main/scala/com/normation/rudder/web/components/DirectiveEditForm.scala
	rudder-web/src/main/scala/com/normation/rudder/web/components/popup/ModificationValidationPopup.scala
Create change request, can be seen in cr management, details too
Remove Utilities from Administration Menu
Add status display in details page
First steps to commit modifications