yui/shifter — pull request #86 by caridy (2013-06-06 21:50:54+00:00)
Title: adding support for assets on css modules

In the core library CSS modules are not using images or any assets, but custom css modules might come with some `url()` statements, in which case the `assets` folder should be copied over the build folder, and `cssproc` should be honored.

This requirements comes from Media, where they want to build stuff like this:

```
"stencil-css": {
"cssfiles": [
"base.css",
"grid.css",
"grid-responsive.css",
"table.css"
],
"assets": true
}
```