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

Cleanup readme to make it easier to read/edit.

Prefer W3C pointer events and updates to match the standard definition

Updates copyright to 2018

* add support for overriding the default layout
New `overrideLayout` option (if true) will prevent h/w calcs.

* fix error if options are empty

* Implement requested changes
Rename overrideLayout to disableLayout and remove code to unset display

This reverts commit f76b4fda.

Prefer W3C pointer events, remove pointerEnabled references (it is not part of the standard), unconditional event removal