Added highlight.js as a submodule

Signed-off-by: J. Renée Beach <splendidnoise@gmai.com>
Checkout highlight.js 7.3 tag

Signed-off-by: J. Renée Beach <splendidnoise@gmai.com>
removed the reveal and highlight submodules.

Signed-off-by: J. Renée Beach <splendidnoise@gmai.com>
Deleted all the files.

Signed-off-by: J. Renée Beach <splendidnoise@gmai.com>
Moved reveal to the root of the project.

Signed-off-by: J. Renée Beach <splendidnoise@gmai.com>
indentation to spaces

Signed-off-by: J. Renée Beach <splendidnoise@gmai.com>