Fixes #3732: take technique version into account to decide if a directive is modified
Merge pull request #279 from fanf/bug_3732/migrate_directive_there_are_no_modifications_to_save

Fixes #3732: take technique version into account to decide if a directive is modified
Change version of pom.xml to 2.6.4-SNAPSHOT
Merge branch 'branches/rudder/2.6' into branches/rudder/2.7

Conflicts:
	pom.xml
	rudder-core/pom.xml
	rudder-web/pom.xml