Budget + Affichage de la satisfaction et budget

UniversityTycoon/src/fr/universitytycoon/budget/Budget.java

+package fr.universitytycoon.budget;
+
+import fr.universitytycoon.Instance;
+
+public class Budget {
+
+	private long budget;
+	
+	public Budget() {
+		budget = Long.parseLong(Instance.getInstance().getConstants().getProperty("defaultBudget"));
+	}
+	
+	
+	
+	public boolean cost(String category, String name, long cost) {
+		if(cost <= 0) return false;
+		if(budget-cost < 0) return false;
+		budget -= cost;
+		
+		new Cost(category, name, cost);
+		
+		return true;
+	}
+
+
+
+	public long getValue() {
+		return budget;
+	}
+	
+}