Please review http://codex.wordpress.org/Function_Reference/wp_enqueue_script and update your plugin accordingly.

Keep in mind: Offloading the default jquery and other scripts to Google is similarly disallowed. If your code doesn't work with the built-in jQuery, it's most likely a noconflict issue. If you can't guess, we -really- want you to use our jquery, and if you can't, we need to know why so we can fix things for everyone.

Also note that you're using <link> and <style> instead of the correct enqueues in your header and footer files. You really should integrate those files with WordPress so they can use all the functions etc. That will also make things safer, as it'll prevent non-users from being able to hit those files directly, if you do it correctly.

When you've corrected your code, reply to this email with the updated code attached, or provide a link to the new code.