Use of domain-alias in development

Allows to specify an array of white-listed domain alias in local development: 

```bash
# /etc/host
127.0.0.1	localhost

127.0.0.1       sub1.myDomain.ext
127.0.0.1       sub2.myDomain.ext
```

```javascript
// config/environment.js
ENV.liveReloadHosts = ['*.myDomain.ext']
```