Merge branch '29-clean-improve-update-code' into 'master'

android/app/build.gradle

android/gradle.properties

assets/fonts/Nunito-Bold.ttf

assets/fonts/Nunito-Light.ttf

assets/fonts/Nunito-Medium.ttf

assets/fonts/Nunito-Regular.ttf

assets/translations/en.json

assets/translations/fr.json

assets/ui/button_back.png

assets/ui/button_delete_saved_game.png

assets/ui/button_resume_game.png

assets/ui/button_start.png

assets/ui/game_draw.png

assets/ui/game_fail.png

assets/ui/game_win.png

assets/ui/placeholder.png

fastlane/metadata/android/en-US/changelogs/23.txt

fastlane/metadata/android/fr-FR/changelogs/23.txt

icons/build_game_icons.sh

lib/board.dart