Use the <preview> tag only when a shortDescription is given
(MailChimp appends it's own description, so this tag is needed
only for transactional emails)
Update styling on button - add more top and bottom margin
Add simple registration open template
Various typo fixes (thanks @snyderks, @domfarolino, and @koreyhuskonen)
@domfarolino and team,
A few updates in v2.0.1 of revolutionuc-emails:
<preview>tag only when a shortDescription is given (MailChimp appends it's own description, so this tag is needed only for transactional emails)