Changes in 0.5.4:
-----------------
* Do not automatically update po files                (Shaun McCance)
* Fixed incorrectness in depth chunk                  (Shaun McCance)
* Improvements to the footnotes stuff                 (Shaun McCance)
* Fixed stupid oversight with the default:LTR string  (Shaun McCance)
* Updated translations:
  en_CA   (Adam Weinberger)
  es      (Francisco Javier F. Serrador)
  fi      (Ilkka Tuohela)
  gl      (Ignacio Casal Quinteiro)
  gu      (Ankit Patel)
  ja      (Takeshi AIHANA)
  nb      (Kjartan Maraas)
  nl      (Tino Meinen)
  no      (Kjartan Maraas)
  vi      (Clytie Siddall)
  zh_CN   (Funda Wang)
  zh_HK   (Chao-Hsiung Liao)
  zh_TW   (Chao-Hsiung Liao)