How can I change this PHP to work with new Twitter API v1.1.
Obviously it was working swell until today when it completely broke 3 sites which were using it. 
Thanks in advance for the help.
<?php
//Path to include feed.php file located in wp-includes folder.
include_once(ABSPATH . WPINC . '/feed.php');
//Feed URL
$twitterID = get_option('solostream_twitter_username');
$rss = fetch_feed('http://api.twitter.com/1/statuses/user_timeline.rss?screen_name='.$twitterID);
$tweetnumber = get_option('solostream_twitter_feed_number');
$maxitems = $rss->get_item_quantity($tweetnumber);
$firstitem = 0; /** Specify the first item. 0 to start from the newest tweet. **/
$rss_items = $rss->get_items($firstitem, $maxitems);
?>
<ul>
<?php
if ($maxitems == 0)
echo '<li>No Tweets Yet!</li>';
else
//Loop through each feed item and display it as a link.
foreach ( $rss_items as $item ) { ?>
<li>
<img src="http://api.twitter.com/1/users/profile_image?screen_name=<?php echo get_option('solostream_twitter_username'); ?>" /><!-- Get the tweet item date.--> <span><?php echo $item->get_date(); ?>
</span><br /> <!-- Get the tweet item title as an external link.-->
<a href='<?php echo $item->get_permalink(); ?>' target="_blank"
title="External Link…" rel="nofollow"> <?php echo $item->get_title(); ?>
</a>
</li>
<?php } ?>
</ul>
