Brussels (be-wa-brussels-fr, be-wa-brussels-du)

![image](https://cloud.githubusercontent.com/assets/31717/5420660/217b8ebe-8226-11e4-8102-d9360b4362fe.png)

per https://github.com/openaddresses/openaddresses/issues/760#issuecomment-66845223

mixed feelings about using `-` as the delimiter for the language, but I'm pretty sure that source.fr.json would break parts of conform.