Squashed 'cgilite/' changes from c207699..b65a5ae

Squashed 'cgilite/' changes from c207699..b65a5ae

b65a5ae md: heading identifiers
b089a33 md: handle DOS line breaks
fa3afea md: task lists
cd49a5c HTML escaping, switchable HTML processing
4f5d122 md: inline HTML
fcdebd0 bugfix: stop condition in HTML block
987f4ef md: verbatim html block, md: allow emphasis before punctuation
1218334 md: image embedding, completing support for basic markdown
c1eb795 md: horizontal rules
b2cf4a3 md: allow hard line breaks; md extension: ignore embedded underscores
4f6c3fe todo items
3d2264c include markdown processor
80b3d8c try automatic switching to busybox for uuencode and sha256sum

git-subtree-dir: cgilite
git-subtree-split: b65a5aecf5675a87f47f0888e90ceea5dbfb219c