3.20.0 ====== * Improved links for the platform overview (Alexandre Franke) * Clarifications and improvements to the programming guidelines (Philip Withnall, Sébastien Wilmet) * Typo and small fixes for the optimization guide and HIG (Anders Jonsson) * Use CC-BY-SA 4.0 for the platform overview (Ekaterina Gerasimova) * Updated translations: cs (Marek Černocký) de (Mario Blättermann, Christian Kirbach) el (Tom Tryfonidis, Γιάννης Κουτσούκος) es (Daniel Mustieles, Javier Mazorra) ko (Seong-ho Cho) sv (Anders Jonsson)