message: script to publish a demo
diff: "scripts": {
  "start": "webpack-dev-server --env dev",
  "dist": "del dist; webpack --env prod",
  - "gh-pages": "npm run dist && node gh-pages.publish.js",
  + "publish:demo": "npm run dist && node gh-pages.publish.js",
  "test": "karma start karma.conf.js",
  "test:watch": "npm test -- --no-single-run --auto-watch",
  "codecov": "cat coverage/*/lcov.info | ./node_modules/codecov.io/bin/codecov.io.js",
  