Build an examples index for github pages

Github pages doesn't do directory listings by default

This is a bit hacky and manual but it works.

examples/build-index.sh

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+#!/bin/sh
+
+rm index.html
+
+echo "<h1>reveal.js example decks</h1><ul>" >> index.html
+for deck in `ls *.html`; do
+    name="${deck%.html}"
+    echo "<li><a href='$deck'>$name</a></li>" >> index.html
+done
+echo "</ul>" >> index.html

examples/index.html

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+<h1>reveal.js example decks</h1><ul>
+<li><a href='auto-animate.html'>auto-animate</a></li>
+<li><a href='backgrounds.html'>backgrounds</a></li>
+<li><a href='barebones.html'>barebones</a></li>
+<li><a href='index.html'>index</a></li>
+<li><a href='layout-helpers.html'>layout-helpers</a></li>
+<li><a href='markdown.html'>markdown</a></li>
+<li><a href='math.html'>math</a></li>
+<li><a href='media.html'>media</a></li>
+<li><a href='multiple-presentations.html'>multiple-presentations</a></li>
+<li><a href='transitions.html'>transitions</a></li>
+</ul>