add more beef to the grant update

blog_posts/tpf/TPF_grant_update_6.md

@@ -1,4 +1,4 @@
-# Grant Update
+# Yet Another TPF Parrot Embed/Extend Grant Update
 
 I am excited to announce that I have completed my next grant milestone!  I
 recently increased test coverage of extend_vtable.c to at least 95.5%, achiving
@@ -16,4 +16,20 @@ This was a fruitful exercise, because it was decided by Parrot developers that
 some VTABLE functions escaped accidentally and were removed from the public API.
 Whiteknight++ removed Parrot_PMC_destroy, which I was using incorrectly in the
 extend_vtable tests and which was actually coredumping Parrot, but only on certain
-platforms. I then asked
+platforms. I then asked ...
+
+The remaining, untested functions in extend_vtable are clone_pmc, cmp_pmc,
+get_pointer_keyed_int, get_pointer_keyed_str, remove_vtable_override,
+set_pointer_keyed and set_pointer_keyed_str. I leave the testing of these
+funcitons as an exercise to the interested reader :)
+
+## Grant Refactoring
+
+This reminds me of a saying, I can't remember it exactly, but it is something
+about the best laid plans of camels and butterflies often taste like onions.
+Anyway, since I wrote my grant, the Parrot Embed API was deprecated and replaced
+with a shinier and better documented system. After talking with cotto++ and
+whiteknight++ on IRC, it was decided that working on test coverage for the new
+embed API was a better use of resources than writing tests for the old embed
+API that my original grant referred to, which will most likely be removed from
+Parrot soon.