Feature/serverlist

Added a new ```ServerListInfoResult``` for the serverlist result, because your ```ServerInfoResult``` has all properties set to required. But ```serverlist``` only returns theses properties.

```
virtualserver_id=1
virtualserver_port=9987
virtualserver_status=online
virtualserver_clientsonline=3
virtualserver_queryclientsonline=1
virtualserver_maxclients=50
virtualserver_uptime=26096
virtualserver_name=ServerName
virtualserver_autostart=1
virtualserver_machine_id
virtualserver_unique_identifier=asdasdasdasd
```

Option ```-short``` only returns:
```
virtualserver_id=1
virtualserver_port=9987
virtualserver_status=online
```