Fixes and new stuffs
* Passes arguments (json object) to functions called withing Playgroung
* RickShaw is buggy for movable window, but workaround applied and issue created -- hence we can see *new* data arriving in a window filled by Scala futures.
* added an argument to `run` : `no_browser` to not try to open the browser (which can be quickly annoying while testing and when deployed on servers)
* fixes the duplicated piublishing event in playground.coffee for dataO (removed application, that was publishing it)