add developer documentation

Change-Id: I95654c6260a327fe52bde2b372668540ac25bcd1
diff --git a/index.rst b/index.rst
index 73d5499..a0d2324 100644
--- a/index.rst
+++ b/index.rst
@@ -56,6 +56,15 @@
    testing/acceptance_specification
 
 .. toctree::
+   :maxdepth: 3
+   :caption: Aether Developer Notes
+   :hidden:
+   :glob:
+
+   developer/sdcore
+   developer/roc
+
+.. toctree::
    :maxdepth: 1
    :caption: Meta
    :hidden: