Embedding Unity5 WebGL "window" in a web page

I've been playing around with the WebGL Preview in Unity5 and am able to successfully publish some simple stuff with "Build and Run". But in this case, Unity creates a web page and places the content for you.

I would like to know how to access the WebGL content myself so that I can place it into a web page and enable bi-directional communication with it and so on. With the web player, this is all fairly painless using UnityObject2.js.

Any advice? Thanks!