Changes in 2.31.6:
------------------
* Don't double-add pages, also fixes #621398
* Adjusted to API changes in GSettingsBackend
* Only store window size if it really changes
* Don't segfault on http:// URIs (Rupert Swarbrick)
* Preserve both page_id and frag_id for file: URIs
* Added "Copy Code Block" and "Save Code Block As"
* Update JS fragment highlighter for yelp-xsl changes
* Get actual link text for read-later links
* Use index.docbook for help: URIs
* Transitioned to GDBus
* Updated translations:
  et      (Ivar Smolin)
  th      (Sira Nokyoongtong)
  gl      (Fran Diéguez)
  sl      (Matej Urbančič)
  es      (Jorge González)
  nb      (Kjartan Maraas)
  he      (Yaron Shahrabani)