Adjusted styles for markdown-rendered HTML.

Markdown-stuff no more wrapped inside <div class="markdown">.

Unified the formatting of parameter lists and normal lists, so
that creating list with markdown results in something similar
created with built-in parameters list.

Paragraphs now always have margins and aren't crushed together
in method comments.

<strong> is no more has display:block - that was just insane.

Finally added DOCTYPE for touch of sanity.