Reshuffle spec into sections roughly right as per PR #52

drafts/address-book-repo.rst

@@ -0,0 +1,14 @@
+Address book repository
+=======================
+
+.. NOTE::
+  This section is a work in progress.
+
+.. TODO-spec
+  Do we even need it?  Clients can use out-of-band addressbook servers for now;
+  this should definitely not be core.
+  - format: POST(?) wodges of json, some possible processing, then return wodges of json on GET.
+  - processing may remove dupes, merge contacts, pepper with extra info (e.g. matrix-ability of
+    contacts), etc.
+  - Standard json format for contacts? Piggy back off vcards?
+