:wrench: Add security warning

lib/renderer/init.js

@@ -129,6 +129,15 @@ if (nodeIntegration === 'true') {
     }
   }
 
+  if (/(https?)|(ftp):/.test(window.location.protocol)) {
+    let warning =  'This renderer process has Node.js integration enabled '
+        warning += 'and attempted to load remote content. This exposes users of this app to severe '
+        warning += 'security risks.\n'
+        warning += 'For more information and help, consult https://electron.atom.io/docs/tutorial/security/'
+
+    console.warn('%cElectron Security Warning', 'font-weight: bold;', warning)
+  }
+
   // Redirect window.onerror to uncaughtException.
   window.onerror = function (message, filename, lineno, colno, error) {
     if (global.process.listeners('uncaughtException').length > 0) {