[nice to have] update readme to include quickstart examples

[stefek99]

Tell a little bit more how to quickstart playing with demos, ie what markers are required...

[well done BTW]

[jeromeetienne]

Markers needs to be kidof round and of flashy color.

Orange balls

Postit

Dish gloves

Then you need to tune the color manually. It would ne bice to have a auto tuning, i got idea on how to do it. But not the time for now