rm extrenous whitespace

themes are now available as separate css files under css/theme/, old theme option in config is no longer supported (closes #104)

this way, more browsers are supported, like older Opera/Chrome/FF

this way things are in Impact; Impact fits much more with the visual style than does the default Arial or Calibri.

use mq to reduce font size for low resultions, max limit on width for slides set to 900px (closes #49)

if you resized the window or visited the page on a small screen everything would be amiss

now, I've fixed that with a one-liner

Woohoo! The slideshow now responds to resizing of the browser nicely!

add beige theme, move theme class from .reveal to document element, use log instead of alert to demonstrate custom events