Create the link only if the existing link as a wrong target
Mark propertiy as required with value @@@@
Add pre_execute projet parameter to execute a target before every other
target
Merge branch 'Pre_execute_traget'
Merge branch 'Property_as_required'
Merge branch 'SymlinkTask_link_check'

Conflicts:
	classes/phing/tasks/ext/SymlinkTask.php