Wish: Allow comments for presentation notes

[jan-lehmkuhl]

When I prepare my slides I like to add notes in the slides to remember what to say on presentation day.
Add html comments like in other markdown files would be awesome.

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PS amazing work, thanks

[programandala-net]

This is the first thing I've missed when I've tried mdp. Internal comments are very useful in any kind of source code. Until HTML comments are supported, a workaround is to preprocess the source, for example with vim or sed, and get a version without comments.