Compress static CSS assets using a post-processor
Compress static CSS assets using a post-processor

The govuk_template file generates .css.erb templates which don't get
processed by SASS so end up not being compressed because of the changes
in 5409d8e. Fix this by running them through the SASS compressor as part
of a post-processing step once the asset path has been resolved.

alphagov/static,alphagov/static,alphagov/static