Changes in 0.19.2:
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* Added 'css' command for Mallard documents
* Fixed theme.color.text default, was white-on-white
* Implemented previous and next links for Mallard documents
* Updated translations:
  sv    (Daniel Nylander)
  de    (Mario Blättermann)
  nb    (Kjartan Maraas)
  es    (Jorge González)