message: save-dev classnames
diff: "babel-preset-react-optimize": "^1.0.1",
  "babel-register": "^6.24.1",
  "babili-webpack-plugin": "^0.1.1",
  + "classnames": "^2.2.5",
  "concurrently": "^3.5.0",
  "cross-env": "^5.0.1",
  "css-loader": "^0.28.4",
  