Log Message:
Update www/thoth to 0.1.3.  Changes from version 0.1.2 include:

* When creating or editing a blog post or page, the preview is displayed above
  the edit form rather than below it.
* Spaces in blog post URLs are replaced with - rather than _ (this change will
  only affect new posts; existing post URLs will not be changed).
* Blog posts provide Atom feeds for recent comments.
* Tag pages provide Atom feeds for posts with that tag.
* Blog posts are marked up using the hAtom microformat.
* Thoth auto-generates an XML sitemap at http://yourblog.com/sitemap (set
  site.enable_sitemap to false to disable).
* Comment URLs are built using the name of the post the comment is attached to
  rather than the id.
* Fixed a bug that prevented Atom and RSS feeds from being cached when
  server-side caching was enabled.
* Fixed entry titles in Atom feeds claiming to be type="html" when in fact
  they weren't.
* Fixed a bug that sometimes caused flash messages to be cached with the
  output of an action and re-displayed until the cached action expired.