PDD puzzles collector.

Recent commits:
DronMDF/goost fidals/shopelectro opencharles/charles-rest opencharles/mention-notifications-ejb yegor256/cactoos zerocracy/farm

Made by @yegor256 for Zerocracy.

Currently deployed version 0.20 Git version on the server 2.13.0 Ruby version on the server 2.3.3