Changes in this release:

* Fixed several formatting problems in the Prince-generated PDFs.
* Fixed `<cxx-definition-section>` and `<cxx-footnote>` when used within
  included HTML files.
* Reverted the change to use the full ISO title in working drafts.
* Bumped the Polymer dependency to 0.2.4, which shouldn't have any visible
  effects.
* Removed `<link rel="import">`s when publishing, which may speed up rendering
  slightly.