bring install instructions to top, as is tradition

The Install was waaaay at the bottom, which didn't make sense to scroll through all the detailed documentation, just to find how to get started with an install.

add a full list of transitions to readme

Clarify the meaning of the notes?: regex

Fix timer when speaker notes window opened via RevealNotes.open()

Adding support for hash linked slideNumber

* Print background in pdf

Pull request to integrate issue https://github.com/hakimel/reveal.js/issues/1686. Adding the workaround to the theme template to make it work for every theme.

* apply suggestion of @hakimel