init touchbar menu

lib/main-app.js

@@ -78,9 +78,11 @@ app.on('ready', function () {
 
   var template = require('./main-menu')
   var menu = Menu.buildFromTemplate(template)
+  var touchBarMenu = require('./touchbar-menu')
   switch (process.platform) {
     case 'darwin':
       Menu.setApplicationMenu(menu)
+      mainWindow.setTouchBar(touchBarMenu)
       break
     case 'win32':
       mainWindow.setMenu(menu)