Check if a user has voted for your page.
####Example
<?php
require_once 'findretros_config.php';
require_once 'findretros.php';
$FindRetros = new FindRetros();
if($FindRetros->hasClientVoted()) {
echo 'You have voted!';
}else{
// echo 'You have yet to vote!';
$FindRetros->redirectClientToVote();
}