Add config option to debug UI router

#9

Added ``debugUiRouter`` in the ``config.json``. Example of ``client/config.json``:

```javascript
{
  "development": {
    "backend": "http://localhost/skeleton/www",
    "debugUiRouter": true
  }
}
```

State changes/ errors are reported in the console:

![localhost_9000___dashboard_1_events_and_grunt_serve_ _node_ _80x24](https://cloud.githubusercontent.com/assets/125707/5562006/0ada2f88-8e08-11e4-9ad3-3016e4d76c44.jpg)