The build currently doesn't do anything other than basically just load the JS files and test that some global objects are created, but if it did actually run code, which it will in the future, then this will break it if you don't have google analytics installed (which Vellum doesn't -- `_gaq` is only defined in HQ's JavaScript.

Other organizations (http://kobocollect.org for instance) are trying to use Vellum and I think that would be incredibly valuable.  For that reason, but also because it leads to better everything in general, it's important to be thoughtful about what you do when you add new dependencies.

Bad:
```python
_gaq.push(['_trackEvent', 'Form Builder', 'Copy', foo[0].typeName]);
```

Better:
```python
if (_gaq) {
    _gaq.push(['_trackEvent', 'Form Builder', 'Copy', foo[0].typeName]);
}
```

```
# README
Vellum will track events using Google Analytics.  This can't be disabled at the moment.
```

Best:
```python
formdesigner.pluginManager.call('trackEvent', 'Copy', foo[0].typeName);
```