bitovi/canjs — pull request #711 by justinbmeyer (2014-01-31 23:14:50+00:00)
Title: Fixes can.Map::compute to handle deeply nested properties

The following test now passes:

```js
var data = new can.Map({});
var compute = data.compute('summary.button');
compute.bind('change', function () {
ok(true, "compute changed");
});

data.attr({
summary: { button: 'hey' }
}, true);
```