Merge branch '1-first-game-release' into 'master'

assets/translations/en.json

assets/translations/fr.json

assets/ui/button_help.png

assets/ui/button_show_conflicts.png

assets/ui/cell_empty.png

assets/ui/game_win.png

assets/ui/placeholder.png

assets/ui/skin_digits.png

fastlane/metadata/android/en-US/changelogs/1.txt

fastlane/metadata/android/en-US/full_description.txt

fastlane/metadata/android/en-US/images/featureGraphic.png

fastlane/metadata/android/en-US/images/icon.png

fastlane/metadata/android/en-US/short_description.txt

fastlane/metadata/android/en-US/title.txt

fastlane/metadata/android/fr-FR/changelogs/1.txt

fastlane/metadata/android/fr-FR/full_description.txt

fastlane/metadata/android/fr-FR/short_description.txt

fastlane/metadata/android/fr-FR/title.txt

fdroid_metadata.yml

gradle/wrapper/gradle-wrapper.jar