Error loading Snap with webpack

When loading Snap (from the dev branch) with [webpack](http://webpack.github.io/docs/).

``` javascript
var Snap = require('snapsvg');
```

browser throw error `Uncaught TypeError: Cannot read property 'on' of undefined` 

from line 1625 in svg.js

``` javascript
...
// default
eve.on("snap.util.getattr", function () {
    var att = eve.nt();
...
```
