title: 'select all' and 'remove all' with chosen.js
body: <p>For the select menu plugin <a href="http://github.com/harvesthq/chosen" rel="noreferrer">chosen.js</a>, is there an established way to add 'select all items in list' or 'remove all items in list' feature to a multiple select input? In the main branch or perhaps in one of the forks? Or has someone done this before has some tips?</p>