Update NEWS with release note of version 1.7.5 to 1.7.7

NEWS

@@ -62,6 +62,27 @@ Version 2.0
 Glances Version 1.x
 ==============================================================================
 
+Version 1.7.7
+=============
+
+* Fix CVS export [issue #348]
+* Adapt to PSUtil 2.1.1
+* Compatibility with Python 3.4
+* Improve German update
+
+Version 1.7.6
+=============
+
+    * Adapt to psutil 2.0.0 API
+    * Fixed psutil 0.5.x support on Windows
+    * Fix help screen in 80x24 terminal size
+    * Implement toggle of process list display ('z' key)
+
+Version 1.7.5
+=============
+
+    * Force the Pypi installer to use the PsUtil branch 1.x (#333)
+    
 Version 1.7.4
 =============