Localization dont work for some strings.

Hi,

I was unable to translate two strings. Solved by adding missing t() for them:

  drupal_set_title(t('Validate Timestamp'));
  $output = t('<p>Use this form to ensure that the contents of the document have not been altered since
        the time they were stamped.  If the stamped time and the create time are different, the stamped time
        is the time that will be validated.  When you press "Validate", you will be redirected (in a new browser window) to the blogstamp server which
        created the timestamp.</p>');