fix(zones): update to v0.4.0

Closes angular#487

Author: btford

package.json

@@ -17,7 +17,7 @@
  "systemjs": "^0.9.1",
  "traceur": "vojtajina/traceur-compiler#disable-getters-setters",
  "which": "~1",
- "zone.js": "0.3.0",
+ "zone.js": "0.4.0",
  "googleapis": "1.0.x",
  "node-uuid": "1.4.x"
  },