FYI once I've rewritten the pipeline engine using Highland, it will be easier to reuse parts of pipelines in multiple places, so you can do

```
var writeBoth = all(
  [uglifyjs, toBuildDir],
  toBuildDir
);
//...
pipelines['build:' + name] = [
  glob('./src/plugins/' + name + '.js'),
  requireJS,
  writeBoth
];
```