Fixes #4008: Display Directive version in Directive tree
Merge pull request #331 from VinceMacBuche/ust_4007/implem_4008/Display_DirectiveVersion

Fixes #4008: Display Directive version in Directive tree
Change version of pom.xml to 2.4.12-SNAPSHOT
Change version of pom.xml to 2.6.9-SNAPSHOT
Fixes #4030 : Handle some errors on change request
Change version of pom.xml to 2.7.6-SNAPSHOT
Merge branch 'branches/rudder/2.4' into branches/rudder/2.6
Merge branch 'branches/rudder/2.6' into branches/rudder/2.7
Merge branch 'branches/rudder/2.7'
Merge pull request #332 from VinceMacBuche/bug_4030/None.get

Fixes #4030 : Handle some errors on change request
Merge branch 'branches/rudder/2.4' into branches/rudder/2.6
Merge branch 'branches/rudder/2.6' into branches/rudder/2.7

Conflicts:
	pom.xml
	rudder-core/pom.xml
	rudder-core/src/main/scala/com/normation/rudder/services/modification/DiffService.scala
	rudder-web/pom.xml
Merge branch 'branches/rudder/2.7'
Fixes #3953: Add change request API
Merge pull request #336 from VinceMacBuche/ust_3952/implem_3953/Add_Change_request_API

Fixes #3953: Add change request API