use better face distance sorting/matching algo

TODO

@@ -1,17 +1,13 @@
 ## GENERAL
-    * Face matching:
-        - upgrade to face distance per face per file [DONE]
-        - face locations:
-            START FORM SCRATCH for prod so all images have face_locn data
-        - need to reconsider whether current distance algorithm gives best match - can I do better?
+    * face locations --  START FORM SCRATCH for prod so all images have face_locn data
 
     * per file you could select an unknown face and add it as a ref img to an existing person, or make a new person and attach?
     * from menu, we could try to get smart/fancy... say find face with largest size, check it vs. other faces, if it matches more than say 10? we offer it up as a required ref img, then cut that face (with margin) out and use it is a new ref image / person
         - read that guys face matching / clustering / nearest neighbour examples, for a whole new AI capability
+            https://www.pyimagesearch.com/2018/07/09/face-clustering-with-python/
 
     * fix up logging in general
     * comment your code
-        * js files
         * html files?
 ## DB	
     * Dir can have date in the DB, so we can do Oldest/Newest dirs in Folder view