Merge pull request #1 from LO23/master

Update
Merge pull request #2 from LO23/master

Update
Merge pull request #1 from LO23/master

Update
worker management
cleanup quality
Merge branch 'master' into workerDev
adding Rights class
correction des noms de packages
Merge pull request #31 from kofronpi/workerDev

[NETWORK] Multithreading basis
Merge pull request #32 from Holywa/editingClasses1

adding Rights class
Création objet Song
Ajout Exception Insufficient rights
Class implementation
merge
Merge pull request #33 from VincentCharpentier/Vincent

correction des noms de packages
Merge pull request #35 from Elthum/master

[Music]Création objet Song
Merge pull request #36 from jibzou/master

[Music] Grade Class implementation
strategy deleted
Corrections générales sur la structure (WindowComponent indépendant), modification des constructeurs des AbstractView et AbstractController
Merge branch 'master' of https://github.com/LO23/BitMusic into IHM_corrections