added reference image class, also tweaked DB classes to have foreign keys, so you cant delete a person connected to a file (tested). Also made refimg class do some quirky bootstrap/jquery to get file dialogs not looking like crap

main.py

@@ -30,6 +30,17 @@ Bootstrap(app)
 from settings import Settings
 from files import Files
 from person import Person
+from refimg import Refimg
+from ai import *
+
+####################################### CLASSES / DB model #######################################
+class Person_Refimg_Link(db.Model):
+    __tablename__ = "person_refimg_link"
+    person_id = db.Column(db.Integer, db.ForeignKey('person.id'), unique=True, nullable=False, primary_key=True)
+    refimg_id = db.Column(db.Integer, db.ForeignKey('refimg.id'), unique=True, nullable=False, primary_key=True)
+
+    def __repr__(self):
+        return "<person_id: {}, refimg_id>".format(self.person_id, self.refimg_id)
 
 ####################################### GLOBALS #######################################
 # allow jinja2 to call these python functions directly