docs: Release notes for version 0.2.0

Change-Id: Ied19433005fb01dee3f182ed2848cb8cf5ab37b0
Refs: #1714
diff --git a/docs/index.rst b/docs/index.rst
index 88f0b60..45f126a 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -31,6 +31,8 @@
 
 **Additional documentation**
 
+* `NFD Developer's Guide <http://named-data.net/wp-content/uploads/2014/07/NFD-developer-guide.pdf>`_
+
 * `NFD Wiki <http://redmine.named-data.net/projects/nfd/wiki>`_
 
   + `NFD Management protocol <http://redmine.named-data.net/projects/nfd/wiki/Management>`_