/**
 * Fetch recent mentions from our main account (currently hard-coded)
 * Included so our backend could offer ability to reply to users
 * @param integer $limit limit the requested tweets to this amount (use this! saves lots of b/w)
 * @return array hash of content from the Twitter API.
 */
function getRecentMentions($limit = 8)
{
    global $twitterKeys;
    $twit = new TwitterAPIExchange($twitterKeys);
    $resource = 'https://api.twitter.com/1.1/statuses/mentions_timeline.json';
    $fields = array('count' => $limit, 'trim_user' => true);
    $result = $twit->setGetfields($fields)->buildOauth($resource, 'GET')->performRequest();
    // TODO error handling
    return json_decode($result, true);
}