title: rebind angular expressions by filter
body: <p>my filter has config that my change at any time,
  i need to listen to <code>config.change</code> and rebind all the expressions using this filter.</p>
  
  <p>for example: i have translate filter that return string from a object by key and language the user choose (in a <code>&lt;select&gt;</code>). when the user choose another language i need to rebind all the expressions that using the translate filter.</p>
  
  <p>and the answer "set the <code>$stateful</code> on the filter to <code>true</code> and run <code>$rootScope.$apply();</code> when you need to rebind" is not accepted (performance, performance, performance..)!</p>