Save

First try of save function
Revert "Save"

This reverts commit bb7ee548f49106e0467fffffebb9dcec39505c8c.
Revert bb7ee54..840cfde

This rolls back to commit bb7ee548f49106e0467fffffebb9dcec39505c8c.
Deleted unwanted files
Maj Angular + Sauvegarde via Local Storage
Modification de la gestion des niveaux
Gestion des undos/redos
Gestion des objets (Initialisation)
Modification mineure sur la gestion des objets
Merge branch 'save'