DataTables/DataTables — pull request #226 by samvdb (2013-09-04 09:04:15+00:00)
Title: Add CSS class to length select element

I was looking for a way to style the SELECT element from the length feature.
There is option to add a css class to the entire menu wrapper but not to the item itself.
For bootstrap 3 styling the class "form-control" is required on this select element.

I added **sLengthMenu** to the classes which you can extend.

```
/* Default class modification */
$.extend( $.fn.dataTableExt.oStdClasses, {
"sLengthMenu": "form-control input-sm"
} );
```