title: Update s2Member profile info
body: <p>I just started working with S2Memeber and am having problems finding a way to save/update extended user information.</p>
  
  <p>I know to use 's2get' to get info, and there appears not to be something like 's2put'.</p>
  
  <p>How do I go about updating/adding the additional user data that is retrieved with the s2get shortcode?</p>