Feature/Select and Deselect all options

![image](https://f.cloud.github.com/assets/1656069/1811605/c69b6fac-6e5b-11e3-9493-c4b94298c750.png)

Actions options just after the inner menu section.

Use:
```html
<select
            multiple data-size="10"
            data-selected-text-format="count" data-width="100%"
            data-count-selected-text="{0} de {1} selecionados"
            data-select-all-text="Marcar todos"
            data-deselect-all-text="Desmarcar todos"
            data-live-search="true" data-select-all="true" data-deselect-all="true">
<!-- options -->
</select>
```