Trigger after comment is edited.
~~~
<?php
function my_component_init(){
ossn_register_callback('comment', 'edited', 'my_component_cb');
}
function my_component_cb($callback, $type, $params){
// $params['annotation'] contains OssnComments instance and $params['text'] contains the new text.
}
ossn_register_callback('ossn', 'init', 'my_component_init');
~~~
