docs: Prepare version 0.4.0 release notes

Split the long release notes similar to NFD

Change-Id: If5ce5247bf74a4e402a33d92a35a686e7193dea1
diff --git a/docs/release-notes/release-notes-0.3.0.rst b/docs/release-notes/release-notes-0.3.0.rst
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+NLSR version 0.3.0 (changes since version 0.2.2)
+++++++++++++++++++++++++++++++++++++++++++++++++
+
+Release date:  August 1, 2016
+
+**Code changes**:
+
+- Updated validation checker for LSA rule in the configuration file (:issue:`2965`)
+
+- Do not advertise Adjacency LSAs when hyperbolic routing is enabled (:issue:`2402`)
+
+- Do not distribute coordinate LSAs when using link-state routing. (:issue:`3661`)
+
+- LSAs should be segmented before they are published (:issue:`2965`)
+
+- Don't use DummyClientFace::sentDatas (:issue:`3383`)
+
+- Remove disabled security files (:issue:`2960`)
+
+- Lsa type should be argument for base class LSA constructor (:issue:`2788`)
+
+- Use ndn-cxx/DummyClientFace (:issue:`2637`)
+
+**Bug fixes**:
+
+- Unit tests cases are installed with `./waf install` (:issue:`3359`)
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