docs+build: Prepare release of version 0.4.1

Change-Id: Ib353b3b7b40cd77ff1bf4f6bd819124cc51e452e
Refs: #3385
diff --git a/docs/release-notes/release-notes-0.4.1.rst b/docs/release-notes/release-notes-0.4.1.rst
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+ndn-cxx version 0.4.1
+---------------------
+
+Release date: March 25, 2016
+
+Changes since version 0.4.0:
+
+Improvements and bug fixes:
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+- Improved support for ECDSA signatures (:issue:`3438`, :issue:`3439`)
+
+- Support for MustBeFresh selector processing in InMemoryStorage (:issue:`3274`)
+
+- Use InMemoryStorage for StatusDataset and Notification produced by managers based on
+  Dispatcher class (:issue:`2182`)
+
+Removed:
+^^^^^^^^
+
+- Deprecated ``tlvdump`` command-line tool (use ``ndn-dissect`` tool from `NDN Essential Tools
+  <https://github.com/named-data/ndn-tools>`__ instead
+
+Planned features for future releases:
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+- Introduce new API to simplify security transformations (:issue:`3009`)
+
+- NDN trust schema as a description of application trust model, which can help automate data
+  and interest packet signing and authentication (:issue:`2829`)
+
+- Refactored KeyChain abstraction (:issue:`2926`)