Запрос на слияние 'pups' (#2) из pups в master

update README.md

create README.md

delete demo/1212111

upload files

update README.md

create README.md

delete demo/1212111

upload files

create demo/1212111

delete demo/12127.png

delete demo/12126.png

delete demo/12125.png

delete demo/12124.png

delete demo/12123.png

delete demo/12122.png

delete demo/12121.png

update dev/solution.cs