Whitespace!
Convert absolute path of webfonts into relative one

So that it's possible to use a different URL for static assets.
Change compressor settings to fix relative URL issue

When the LESS files are served but compression is disabled, the relative
URL between the generated CSS and other assets is wrong (using the
default compressor settings).  This fixes changes the output directory
name to match the path of Oscar's assets, which fixes this issue.

Related to https://github.com/jezdez/django_compressor/issues/226

Fixes #649