HTML patterns
=============

- `comments` matches comments
- `href` matches and captures tags with references, i.e. `<sometag...href='(...)'`
- `img` matches `<img>` tags with content
- `link` matches `<link>` tags with content
- `meta` matches `<meta>` tags with content
- `pre` matches preformatted text, i.e. `<pre>...</pre>`
- `script` matches inline and external Javascripts, i.e. `<script>...</script>`
- `src` matches and captures tags with sources, i.e. `<sometag...src='(...)'`
- `style` matches inline CSS, i.e. `<style>...</style>`
- `zap_comments` removes comments from matches
