Add release date for 2.1.0

hagenw · hagenw · commit 4279460f3533 · 2016-03-10T09:13:30.000+01:00
diff --git a/NEWS b/NEWS
@@ -1,6 +1,6 @@
 Changes in the Sound Field Synthesis-Toolbox. Recent changes on top.
 
-2.1.0 ()
+2.1.0 (10. March 2016)
 
     - make conf struct mandatory
     - add new start message
