Add py-django-libsass 0.7

django-libsass builds on libsass-python to make @import paths aware of Django's
staticfiles mechanism, and provides a filter module for django-compressor which
uses the libsass-python API directly, avoiding the overheads of calling an
external executable to do the compilation.

WWW: https://github.com/torchbox/django-libsass

• While I'm here, add NO_ARCH

PR: 239061
Submitted by: Alexander Sieg <alex@xanderio.de>