Echo JS 0.11.0

Man, the documentation there is all over the place... I have no clue of what that's about!

Agreed, this is very unclear. A look at the commit history was also useless to grasp it.

You should rewrite it from scratch with the problems it solves as a starting point, i think.

Thanks for your suggestions! I've updated documentation, modified examples & added *.gif to clarify the most complex part.