3.3.3
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* Platform Overview
 - Major reorg of the platform overview (Phil Bull)
 - Merged platform demos into overview (Phil Bull)
 - Updates to various tutorials (Tiffany Antopolski)
 - Added new samples (Susanna Huhtanen)
 - Updated translation:
   es (Daniel Musteles)
   fr (Bruno Brouard)
* Human Interface Guidelines
 - Updated translation:
   es (Daniel Musteles)
* Optimization Guide:
 - Updated translations:
   de (Mario Blättermann)
   fr (Bruno Brouard)