Merge branch '4-set-up-minimal-gameplay' into 'master'

assets/skins/default_8.png

assets/skins/default_mine.png

assets/skins/default_unknown.png

assets/skins/empty.png

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

fastlane/metadata/android/en-US/changelogs/2.txt

fastlane/metadata/android/en-US/changelogs/3.txt

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

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/changelogs/2.txt

fastlane/metadata/android/fr-FR/changelogs/3.txt

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

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

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

icons/build_application_icons.sh

icons/build_game_icons.sh

icons/button_back.svg