Treat div with class "notes" as speaker notes in slide formats.

Currently beamer goes to `\note{}`, revealjs to `<aside class="notes">`,
and the notes are simply suppressed in other formats.

Closes #925.

1 files changed, 18 insertions, 0 deletions

diff --git a/README b/README
index ba1f93661..133c99f64 100644
--- a/README
+++ b/README
@@ -2731,6 +2731,24 @@ bibliographies:
 
     # References {.allowframebreaks}
 
+Speaker notes
+-------------
+
+reveal.js has good support for speaker notes.  You can add notes to your
+markdown document thus:
+
+    <div class="notes">
+    This is my note.
+
+    - It can contain markdown
+    - like this list
+
+    </div>
+
+To show the notes window, press `s` while viewing the presentation.
+Notes are not yet supported for other slide formats, but the notes
+will not appear on the slides themselves.
+
 Literate Haskell support
 ========================