Created Ukrainian version of the article

Translated first two parts: Our Movement for a Free Open Kanban and Open
Kanban Introduction
Moved translation to correct folder
Translated more
Translated 3 practices of Open Kanban
Fully translated document
corrected some mistakes
Replaced the diagram of the Open Kanban Ecosystem
Renamed file to ReadMe
Merge pull request #5 from AgileLady/master

Please submit Ukrainian translation