Changes in 0.20.1:
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* Improved support for SVG imagedata (Shaun McCance)
* Updated translations:
  ca@valencia  (Carles Ferrando)
  de           (Christian Kirbach)
  en_GB        (Philip Withnall)
  es           (Jorge González)
  na           (Hideki Yamane (Debian-JP))
  nl           (Wouter Bolsterlee)