yeoman/grunt-usemin — pull request #369 by molant (2014-05-09 21:51:45+00:00)
Title: Adding support for prefetch link

Currently grunt-usemin doesn't update tags like the following:
```

```

This PR adds support for this by enabling the type prefetch. This is useful if you are generating an asset (for example a CSS sprite) that is going to be used later and it is going to have a random generated filename and you want to download it before it is required.