Makes the links that Twitter Tools posts to Twitter be API-created su.pr links so you can track the number of clicks and such via your su.pr account.
Extract all files from the ZIP file, making sure to keep the file/folder structure intact, and then upload it to
Visit Plugins -> Add New in your admin area and search for this plugin. Click "Install".
Visit Settings -> Twitter Tools: bit.ly and fill in your login and API key.