* Update Storybook UI
* Setup channel for preview
* Load addons from user or load default addons
* Allow easy importing default set of addons
For an example addons.js:
```js
import '@kadira/storybook/addons';
import '@kadira/storybook-addon-hello/register';
```
* Export correct action, linkTo functions
* Rename pageBus to channel
* Fix tests and lint errors
* Update some comments.
