Email header and templates should receive entire $email variable instead of $cid

When we switched e-mail configuration from being a single-configuration to sets of configurations, in most places we eliminated the use of $cid and instead pass around $email (which may contain $cid in $email['address']). We should update our theme functions and templates to have an $email variable instead of $cid. See http://drupal.org/node/731672#comment-2672104 for a little more on this.