Added new model policies for images and controllerslices
diff --git a/planetstack/model_policies/model_policy_Image.py b/planetstack/model_policies/model_policy_Image.py
new file mode 100644
index 0000000..72f76fa
--- /dev/null
+++ b/planetstack/model_policies/model_policy_Image.py
@@ -0,0 +1,13 @@
+def handle(image):
+    from core.models import Controller, ControllerImages, Image
+    from collections import defaultdict
+
+    controller_images = ControllerImages.objects.filter(image=image)
+    existing_controllers = [cs.controller for cs in controller_images] 
+    
+    all_controllers = Controller.objects.all() 
+    for controller in all_controllers:
+        if controller not in existing_controllers:
+            sd = ControllerImages(image=image, controller=controller)
+            sd.save()
+