update changelog and add authors file

AUTHORS

@@ -0,0 +1,13 @@
+# A complete list of authors. For individual contributions please read CHANGELOG
+
+Liles, Jonathan Moore / original-male  (original author)
+    for authors before the fork in May 2020 please see https://github.com/original-male/non
+
+Coelho, Filipe  / falktx (new-session-manager fork)
+Hilbricht, Nils  (new-session-manager fork)
+Runge, David  / dvzrv (new-session-manager fork)
+
+# Individual Contributions in alphabetical surname order
+
+Meyer, Hermann / brummer 
+Picot, Mathieu  / houston 

CHANGELOG

@@ -1,7 +1,8 @@
 v1.4
 Fixed reply for listing sessions from a plain "Done." to proper reply path with empty string as terminal symbol  "/reply", "/nsm/server/list", ""  
     /nsm/server/list ""  raises NSM_API_VERSION_MINOR from 1 to 2 (1.1 -> 1.2)
-Fix operation reply to last treated client instead to reply to sender (houston/mathieu picot)
+Fix operation reply to last treated client instead to reply to sender (Picot, Mathieu  / houston)
+Optional-gui support to nsm.h, for other applications to include and use. (Meyer, Hermann / brummer ) 
 
 v1.3.2
 Rename new-session-manager executable to nsm-legacy-gui to prevent future confusion.