TODO updates

MEMO

@@ -59,13 +59,9 @@ To-do
 - Data implementation tags
   - turn base_indices into offset
   - vectorization
-  - automatic copies
   - write_image()
   - change_arg_to_image (test!)
 
-  - automatic copies from an array with one set of tags
-    to the same array with another set.
-
 - Make tests run on GPUs
 
 - Test array access with modulo
@@ -74,6 +70,8 @@ To-do
 
 - Provide context for more errors?
 
+- Allow mixing computed and stored strides
+
 Fixes:
 
 - applied_iname_rewrites tracking for prefetch footprints isn't bulletproof