Complete rewrite! 2.0!
Specify unit - px, em, rem (whatever you use for media queries)
Now uses window.matchMeda() to build and monitor media query changes (rather then of manually debouncing window resize events)
Increased performance while decreasing min file size (now about a third of the original)
Now single event (renamed to "snap") - still triggered on window, passes data object containing min and max widths and heights