Update README.md

replaced pasted text with wikipedia link and elaborated more on our type of game.
added formating for section heads
Update README.md
Update README.md
Update README.md
Update README.md

embned youtube video
Update README.md

another try to embed video
Update README.md

removed test links, because the merge request was made with master.
Merge pull request #3 from gadamo/master

check new readme