Add patch script

patch

+#!/bin/sh
+
+# Patch the index.html file to remove the controls
+# and the progress indicator from the main presentation
+# and to set the opacity of the progress indicator to
+# semi-transparent for the presentation display.
+
+sed -i s/controls\:\ true,/controls\:\ false,/ index.html
+sed -i s/progress\:\ true,/progress\:\ false,/ index.html
+
+# Also, hide the slide numbers:
+
+sed -z -i 's/.reveal\ .slide-number\ {\n\ \ display:\ none;/.reveal\ .slide-number\ {\n\ \ display:\ none\ !important;/' index.html
+
+echo 'Presentation patched to hide controls and progress indicator.'