So, Python Markdown is a bottomless pit of horrors, including crippling parsing bugs,
random out of nowhere, lack of features. It's definitely much faster, than
Pandoc, but Pandoc doesn't go full retard where there's a regex in a fenced code block,
that happens to be a regex for markdown elements.
Also added some ugly post string replacements to make Pandoc fenced code output work
with Prism:
instead of the Pandoc <pre class="codelang"><code>, Prism wants
<pre><code class="language-codelang>, so I added a regex sub, because it's 00:32.
