Add events so other plugins can alter the rendered pages, like html plugin does

[dietergeerts]

I'm using this plugin to create a static toolkit site, but I have the need to add stuff like favicon etc...., There are wonderful plugins for this, that generate the favicon files for you (https://www.npmjs.com/package/favicons-webpack-plugin), and even add it the html that comes out from the html plugin (https://github.com/jantimon/html-webpack-plugin). I would lik to see events so those plugins can also do the same here.

Or, if it can be done right now, probably in another way, that I would like to hear it.