Update NEWS file for Icarus - v0.27

NEWS

@@ -1,3 +1,34 @@
+Version 0.27.0 - Icarus
+-----------------------
+ * Fix of backend forking (#653). Now real performance boost!
+ * AVP (Attribute-Value Pair) support allowing users to store custom attributes
+   associated with prefixes, VRFs or pools (#394, #631, #629)
+ * Add tags to VRFs for easy categorization and searching (#484)
+ * Add tags to pools for easy categorization and searching (#566)
+ * New status field for prefixes, improving the experience for registry type
+   users. Status can be "assigned", "reserved" or "quarantine". (#494)
+ * New expires field for prefixes allowing users (typically registry) to set an
+   expiration time of an assignment. No actions are actually taken once the
+   expiration time has passed (#599)
+ * Statistics improvements for pools, now shows number of total/used/free
+   prefixes as opposed to just showing it for addresses. The number of free
+   prefixes is calculated based on the default prefix length of new prefixes
+   assigned from the pool (#528).
+ * Rewrite of parts of web-UI using AngularJS (#635, #621, #628, #638)
+ * Add bootstrap CSS for easing web development. Replacement of our own
+   components (like buttons) is off to a soft-start. (#543, #660)
+ * Permission check of .nipaprc to prevent the world reading it (#632)
+ * Fix of open file handle leaks in backend (#485)
+ * Add DB version check for backend to prevent running the backend with the
+   wrong database schema version.
+ * Backend now ships with requirements.txt to ease running it in a virtualenv.
+   Travis-CI also runs a job for testing NIPAP in a virtualenv.
+ * Some work on being more Python 3 friendly (#596, #583, #648)
+ * Fix statistics calculation bug (#590)
+ * Performance improvements (#589)
+ * Some documentation updates (#615)
+ * Various other feature improvements and bug fixes
+
 Version 0.26.4 - Iron Man
 -------------------------
  * Fix edit of VRF RT in web UI (#575)