3.0.1
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* Accessibility Devel Guide:
  - Updated translations:
    es    (Daniel Mustieles, Francisco Serrador)
* Develooper Demos:
  - Added content to Clutter page (Emmanuele Bassi)
  - Install catalog file correctly (Johannes Schmid)
  - Updated translations:
    es    (Jorge González, Daniel Mustieles)
    gl    (Fran Diéguez)
* Human Interface Guidelines:
  - Updated translations:
    es    (Jorge González, Daniel Mustieles)
* Platform Overview:
  - Updated translations:
    de    (Mario Blättermann)
    es    (Daniel Mustieles, Jorge González)
    gl    (Fran Diéguez)