Default node to both side of router

A router should have a default node, by default, on both sides.
![screen shot 2014-09-09 at 12 21 37 pm](https://cloud.githubusercontent.com/assets/1521387/4199997/87daa934-380b-11e4-9aa7-af58497e010b.png)

It's the default value in `Endpoint`