Update to reveal.js 4.1.2 (#136)

- New tools/ script to manually keep step for updates
- Plugins are all updated
- Template update following latest Pandoc version
- updated README for documentation
- Help page updated 
- See other change in NEWS file
diff --git a/inst/reveal.js-4.1.2/.npmignore b/inst/reveal.js-4.1.2/.npmignore
new file mode 100644
index 0000000..50c12b9
--- /dev/null
+++ b/inst/reveal.js-4.1.2/.npmignore
@@ -0,0 +1,7 @@
+/test
+/examples
+.github
+.gulpfile
+.sass-cache
+gulpfile.js
+CONTRIBUTING.md
\ No newline at end of file