added log on requests

Add a simple route log. like:

```
2014/03/06 08:50:38     GET /
2014/03/06 08:50:38     GET /app/
2014/03/06 08:50:38     GET /api/channels
2014/03/06 08:50:38     GET /api/suggestions
```

For me it is very useful when I need see golang server log, or to see what integration tests is running