message: Add babylon back to devDependencies so Reify can find it.
diff: "devDependencies": {
  "babel-core": "^6.23.1",
  "babel-preset-es2015": "^6.22.0",
  + "babylon": "~6.15.0",
  "esprima-fb": "^15001.1001.0-dev-harmony-fb",
  "mocha": "~3.1.2",
  "reify": "^0.4.16"
  