* adds .htaccess files for apache
* adds installation instructions and nginx example
* prevent source folders from being viewed with .htaccess
* adds `index.php` in root folder in case you deploy this whole thing to a subfolder
* updates to work when installed in a subfolder

closes #18

If the input URL contains a fragment, finds the DOM tree at that ID and runs the subtree through the mf2 parser.

closes #15

errors fetching the URL should not result in a 400 response

closes #9

if a property such as `in-reply-to` is an h-cite, the URL is still returned as the `in-reply-to` value, and the h-cite object is available in a different part of the response.

closes #6

* extracts mf2 post contents from pages
* implements authorship discovery to find author info for the URL