Update importlib notes.

Lib/importlib/NOTES

 to do
 /////
 
-* API simplification?
-
-    + write_bytecode -> complete set of bytes for bytecode instead of
-      individual arguments.
-
 * Create meta_path importer for sys.path.
 
-* OPTIMIZE!
-
-  + Write benchmark suite.
-  + Fast path common cases.
-
-    - Absolute name from sys.path.
-    - Relative name from sys.path.
+    + Create hook.
+    + Rewrite Import to use the hook.
 
 * Implement PEP 302 protocol for loaders (should just be a matter of testing).
 
@@ -73,4 +63,13 @@ to do
           * SourceFinder
           * (?) Loader
 
+* Write benchmark suite.
+
+* OPTIMIZE!
+
+  + Fast path common cases.
+
+    - Absolute name from sys.path.
+    - Relative name from sys.path.
+
 * Bootstrap importlib as implementation of builtins.__import__