enable ical ORGANIZER property

<?php
/*
This function enables the ORGANIZER property in the ical event feed. Requires EM 5.9.9 to work.

For installation instructions, see here - http://wp-events-plugin.com/tutorials/how-to-safely-add-php-code-to-wordpress/
*/
add_filter('em_locate_template_args_templates/ical.php', function($args){
    $args['include_organizer'] = true;
    return $args;
});