3.3.1
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* Platform Overview
 - Fixed link in ATK documentation (Joanmarie Diggs)
 - Added previously omitted files to Makefile.am (Tiffany Antopolski)
 - Updated translations:
   es (Daniel Mustieles)
   ja (Jiro Matsuzawa, Okano Takayoshi)

* Platform Demos
 - Added previously omitted files to Makefile.am (Tiffany Antopolski)
 - Added Vala version of Image Viewer Demo (P.F. Chimento)
 - Updated translations:
   ca (Sergi Morraja, Gil Forcada)
   el (Simon Xenitellis, Chris Triantafillis)
   es (Daniel Mustieles)
   fr (Bruno Brouard)

* Integration Guide
 - Updated translation:
   gl (Fran Diéguez)

* Human Interface Guidelines
  - Updated translation:
  es (Daniel Musteles)

* Accessibility Development Guide
  - Updated translations:
  ja (Jiro Matsuzawa)
  es (Daniel Mustieles)