* Raw html can be embedded

The following will render the tag as is:

#+html: <code> Hello </code>

And this will render some Javascript:

#+html: <script> alert('hello') </script>

** HTML blocks

They behave as follows:

#+begin_html
<p style="color:#cafe12; background-color:#999999">
<pre>

Hello.

</pre>
</p>
#+end_html

** Cases on which html should be escaped

This should be escaped: ~<html><script type="text/javascript">(function(){})</script></html>~

# Matches the first =
This should be escaped: =<html><script type="text/javascript">(function(){})</script></html>=

This should be escaped: ~@@html:<script type="text/javascript">@@(function(){})@@html:</script>@@~

# Matches the first =
This should be escaped: =@@html:<script type="text/javascript">@@(function(){})@@html:</script>@@=
