add theme 'blood.'
Add various configuration options to README

Also add a description about the solarized theme.
clone via https - ssh not working anonymously
Add details to README on creating themes.

Closes #662.
Merge pull request #664 from vertti/patch-1

add details to README on creating themes
Merge pull request #657 from asmaps/master

README: clone via https
readme tweak #660
merge readme conflict
Merge branch 'update-readme' of https://github.com/aethanyc/reveal.js into dev
additional config valeus in readme, remove duplicate value, fix commas
Merge branch 'dev' of https://github.com/Walther/reveal.js into dev
include all themes in grunt task
configure notes presentation through query string to avoid flicker
Support per-slide centering

If config.center is false, this change centers slides with the
'center' class.
plug potential xss vector
Added support for postMessage's into any iframes for content that needs to do something when a slide is displayed and hidden.
build latest js, format tweaks
apply @knownasilya's first slide detection fix to dev branch #671
contrib update
merge vertical centering for individual slides