alphagov/govuk_frontend_toolkit — pull request #96 by edds (2014-03-24 08:45:01+00:00)
Title: Add a file-path function for agnostic image urls

The `file-path` function will return either a url prefixed with the
contents of the `path` variable if it is set, or a `image-url` if it is
not set (the default). This lets you use the external link icons on
projects that only use vanilla Sass.

This fixes https://github.com/alphagov/govuk_frontend_toolkit/issues/95