Add option to subscribe to mailinglist

models/tutor.go

@@ -5,6 +5,10 @@ type Tutor struct {
 	Id    int
 	Name  string
 	Email string
+
+	// Does the tutor want to subscribe to the mailinglist for student assistents?
+	// This information has to be extracted from the database by hand.
+	SubscribeToMailinglist bool
 }
 
 type TutorRepository interface {