Prepare CHANGELOG.rst for upcoming changes

Author: lgrahl

CHANGELOG.rst

@@ -1,6 +1,11 @@
 Changelog
 *********
 
+`Unreleased`_ (YYYY-MM-DD)
+--------------------------
+
+- ...
+
 `1.0.1`_ (2017-07-25)
 ---------------------
 
@@ -15,5 +20,6 @@ Changelog
 
 .. _SaltyRTC 1.0 Protocol: https://github.com/saltyrtc/saltyrtc-meta/blob/protocol-1.0/Protocol.md
 
+.. _Unreleased: https://github.com/saltyrtc/saltyrtc-server-python/compare/v1.0.1...HEAD
 .. _1.0.1: https://github.com/saltyrtc/saltyrtc-server-python/compare/v1.0.0...v1.0.1
 .. _1.0.0: https://github.com/saltyrtc/saltyrtc-server-python/compare/aa3aceba46cc8683e640499936a6eaa406819ef8...v1.0.0