Setup the reveal.js framework to make a tutorial slideshow that one can
view in their web browser. Started making the slides, however, I still
left a lot of the example slides in there, so I can reference them if I
need to.
Made the tutorial more complete. Added pretty pictures.
Added tutorial to the master branch. Had to remove some inline scripts from the tutorial index page to get Chrome's security policy to allow it.
Merge branch 'tutorialErik'

Conflicts:
	extension/manifest.json
Update wording in popup shown at install time to use secret phrase instead of extension password
Add link to tutorial to settings popup.  Remove email addresses from tutorial.
Fix the change secret phrase form to listen for the enter key too.