Rename frame attribute to el
Replace events library

`component/events` supports delegation, which doesn't seem possible with
`component/event`.
Definining addEventListener doesn't seem necessary with component/events
Add index template
Split render/display functions
Display the comments inside an IFrame

This is ultimately needed in order to avoid the parent site's CSS
breaking reddit-comments' own CSS. And it's unfortunately still the
most fool-proof way of making this happen. *sigh*

Also, it's how Disqus and most JS widgets actually work.
Add dynamic resizing of the IFrame element
Open all external IFrame links in a new window

This might be frowned upon, but it's probably what all users would
want anyway.
Allow CSS href to be user defined via data attribute

This is needed because the CSS needs to be loaded inside the IFrame.