support embedding some raw audio/video urls.

js/babl/public/index.html

					el.src = match[0];
					return el;
				}
			}, {
				re: /https?:\/\/.*(mp3|ogg)$/i,
				fn: function(match) {
					var el = document.createElement("audio");
					el.controls = "controls";
					el.src = match[0];
					return el;
				}
			}, {
				re: /https?:\/\/.*(mp4|ogv|webm)/i,
				fn: function(match) {
					var el = document.createElement("video");
					el.src = match[0];
					el.controls = "controls";
					el.width = 450;
					return el;
				}
			}, {
				re: /https?:\/\/.*/,
				fn: function(match) {