Render Sumo (#3)

* Use corrected components

* Add renderable node

* Add render system

* Add sumo factory

* Add systems and entities to app

* Remove reference to weight / accel component

* Update dependencies, add pixi and babel-polyfill

* Use babel polyfill

* Add component to store pixi containers

* Add pixi container to the renderable support

* Update factories to produce renderables

* Update the renderable to use pixi

It also uses the new event emitters in serpentity 2.1.0

* Initialize pixi and pass it to renderable system