Why not use image-url when resolving CSS?

[n0nick]

In #49 the rake bower:resolve task was introduced, which replaces any url(some_asset) with a url(<%= asset_path('some_asset') %>) ERB code.

At least for CSS (and Sass), this can be achieved much more cleanly using the asset-url and asset-path helpers -- i.e. converting the above to asset-url(some_asset).

Apart from being a cleaner solution, it also avoids using ERB in the process (since Assets Pipeline already knows to handle this in regular CSS files).

I'm wondering if this can be considered? Thanks!