Support of stderr CRITICAL issues forwarded to app

main.js

@@ -63,7 +63,7 @@ function createWindow () {
     // Dereference the window object, usually you would store windows
     // in an array if your app supports multi windows, this is the time
     // when you should delete the corresponding element.
-    mainWindow = null
+    mainWindow = null;
   });
 
 
@@ -94,7 +94,7 @@ app.on('activate', function () {
   // On OS X it's common to re-create a window in the app when the
   // dock icon is clicked and there are no other windows open.
   if (mainWindow === null) {
-    createWindow()
+    createWindow();
   }
 });