Save the load status into db

I created a console command to fetch the load status and insert it into the database table (records).
The command can be running through cronjob every x minutes 
``` *	*	*	*	*	php app/console power:watch```

or by it self
```php app/console power:watch --keep-going --period=30```

...
Now, we need to think about how can we use this data :smiley: