Mise à jour de diagramme de classes de la couche model
Modification de model.Player en model.Mayor
	modified:   .gitignore
	modified:   application/src/main/scala/com/paris7/mayorpro/model/City.scala
	modified:   application/src/main/scala/com/paris7/mayorpro/model/Mayor.scala
	modified:   deliverables/architecture/model_dc.png
	modified:   application/src/main/scala/com/paris7/mayorpro/model/Budget.scala
	modified:   application/src/main/scala/com/paris7/mayorpro/model/City.scala
	new file:   application/src/main/scala/com/paris7/mayorpro/model/spec.xml
	deleted:    deliverables/architecture/Model-DC.png