added person to refimg class so it can be used in viewer.html

person.py

@@ -27,6 +27,7 @@ class Refimg(db.Model):
     face_locn = db.Column(db.String)
     thumbnail = db.Column(db.String, unique=True, nullable=False)
     created_on = db.Column(db.Float)
+    person = db.relationship( 'Person', secondary="person_refimg_link", uselist=False )
 
     def __repr__(self):
         return "<id: {}, fname: {}>".format(self.id, self.fname )