update changelog

CHANGELOG

@@ -1,6 +1,8 @@
 v1.4
+Better detection of clients that failed to launch leads to faster session startup (by 5 seconds)
+Users get informed by label if an executable is not present on the system or permission denied
 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)
+/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 (Picot, Mathieu  / houston)
 Optional-gui support to nsm.h, for other applications to include and use. (Meyer, Hermann / brummer ) 
 Legacy-GUI: Rewrite labels and buttons with better descriptions.