function log (...args) {
  if (app.ipcReady) {
    windows.main.send('log', ...args)
  } else {
    app.once('ipcReady', () => windows.main.send('log', ...args))
  }
}
In the main electron process, we do not use console.log() statements because they do
not show up in a convenient location when running the packaged (i.e. production)
version of the app. Instead use this module, which sends the logs to the main window
where they can be viewed in Developer Tools.