infodeck: refactorings to support workflow of refactoring deck
infodeck: added mixin for css column-count
infodeck: support coffee library files in deck_dir/js
infodeck: add slide_id method to transformer
infodeck: support decks nested below top level
add highlight sequences for infodecks
infodeck: don't pre-load root svg files for dimensions etc

checks for things like /twlogo.svg but doesn't look for http://martinfowler.com/twlogo.svg
infodeck: fix schema to have many elements in highlight sequence step
infodeck: adding font support for Open Sans
infodeck: move use of open sans to local css file

should do the same with use of Inconsolata
infodeck: add elements to support catalog metadata
infodeck: added generated fallback page for old browsers
infodeck: added some abstract and author info to index html
infodeck: replaced svg ledes with regular text

also set up defaults and vars for fonts
infodeck: fixes #2 location bar updates properly in non-webkit