Merge branch '20-improve-game-architecture' into 'master'

lib/models/settings_game.dart

lib/models/settings_global.dart

lib/models/types.dart

lib/provider/data.dart

lib/ui/layout/game.dart

lib/ui/layout/parameters.dart

lib/ui/layout/tileset.dart

lib/ui/painters/parameter_painter.dart

lib/ui/screens/game_page.dart

lib/ui/screens/page_about.dart

lib/ui/screens/page_game.dart

lib/ui/screens/page_settings.dart

lib/ui/skeleton.dart

lib/ui/widgets/app_bar.dart

lib/ui/widgets/bottom_nav_bar.dart

lib/ui/widgets/button_game_start_new.dart

lib/ui/widgets/game/game_widget.dart

lib/ui/widgets/game/indicator_top.dart

lib/ui/widgets/game/message_game_end.dart

lib/ui/widgets/game/tile_widget.dart