TASKMAN-22: Add dependencies between tasks

* Add the field 'dependencies' in the 'TaskManager.TaskManagerClass'
* Use the custom display for 'dependencies'
Update dafault languages in xdoc
TASKMAN-22: Improve UI when no tasks

* Display a message when there is no possible dependency (no task in DB)
* Improve translations
TASKMAN-22: Display only project's relative deps

* Add a javascript that display only possible tasks from the same project
Merge branch 'master' into TASKMAN-22

Conflicts:
	src/main/resources/TaskManager/TaskManagerTranslations.fr.xml
Merge pull request #4 from woshilapin/TASKMAN-22

TASKMAN-22: Add dependencies between tasks