cleanup specs for mitaka release

* move specs that were not implemented into backlog, except for
  functional testing and py3, since those are ongoing.
* tweak the landing page to show mitaka instead of liberty.
* add implemeted specs from liberty to implemeted spec page.

Change-Id: I1cd8a8c5415fb1e3a4324ac4a4084ff1b16add70

doc/source/implemented.rst

@@ -4,6 +4,14 @@
 Previously Implemented Identity Program Specifications
 ======================================================
 
+Liberty implemented specs:
+
+.. toctree::
+   :glob:
+   :maxdepth: 1
+
+   specs/liberty/*
+
 Kilo implemented specs:
 
 .. toctree::

doc/source/index.rst

@@ -36,13 +36,13 @@ Project Documentation:
    README <readme>
    Specification Template <specs/template>
 
-Liberty approved specs:
+Mitaka approved specs:
 
 .. toctree::
    :glob:
    :maxdepth: 1
 
-   specs/liberty/*
+   specs/mitaka/*
 
 Keystone client approved specs: