added kill/stop functions to top menu

core/titlebar.lua

@@ -71,6 +71,16 @@ return function(c)
             },
             { "Toggle on tag",
                 toggle_screentags
+            },
+            { "Stop task",
+                function() 
+                    awful.spawn("kill "..tostring(c.pid))
+                end 
+            },
+            { "Kill task",
+                function() 
+                    awful.spawn("kill -s KILL "..tostring(c.pid))
+                end 
             }
         },
         vertical = true