A simple overlay for Yuehu.
Showcase at http://yuehu.github.io/overlay/.
Install with component(1):
$ component install yuehu/overlay
var Overlay = require('overlay');
var o = new Overlay();
Show overlay.
Hide overlay.
Fill element to the overlay container.
var el = document.createElement('div');
el.innerHTML = 'This is overlay content';
overlay.fill(el);
MIT