génération de l'arbre à partir de la BDD
Merge branch 'master' of https://github.com/ebaudimo/FrontEnd.git

Conflicts:
	ScheduleMaker/war/WEB-INF/classes/com/pedEdt/frontEnd/client/model/Module.class
	ScheduleMaker/war/WEB-INF/classes/com/pedEdt/frontEnd/client/model/Semester.class
	ScheduleMaker/war/WEB-INF/classes/com/pedEdt/frontEnd/client/model/Teaching.class
	ScheduleMaker/war/WEB-INF/classes/com/pedEdt/frontEnd/client/model/TeachingUnit.class