Adding a date range search for CGridView the easy way

Comparing #8 with #9

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[...]
));
}
?>
```


 
**PLEASE NOTE:** If you currently have a column in your grid view that is displaying the same date attribute you are range-searching on, make sure you set the 'filter' setting to false. E.g.(thank you to yiimike for this tip!) I.e.
 
[...]
'columns'=>array(
'id',
//...
array(
'name'=>'date_created',
[...]
'filter'=>false, // Set the filter to false when date range searching
),
//...
),
));
?>
```
[...]