Add MailChimp Sign-up List to Signup Page

minor CSS updates to fit form on 1 line.

* Need to update Signup form action to Assembly MailChimp Barrtr List
form with 2 form fields :
type="text" name="EMAIL" id="mce-EMAIL"
select name="USERTYPE" id="mce-USERTYPE"
    option value="Designer"
    option value="Small Business"