LibSASS - Unable to use other compile options like source_comments

[z3ugma]

When using the LibSASS filter, only certain kwargs are passed to the sass.compile command.

Per http://hongminhee.org/libsass-python/sass.html#sass.compile, there are a number of other options including source_comments=True that I'd like to able to pass into the filter.

This line calls compile with **args:

webassets/src/webassets/filter/libsass.py

Line 78 in 8380c0d

self.sass.compile(**args)

Where args is a limited dict declared a few lines earlier:

webassets/src/webassets/filter/libsass.py

Line 66 in 8380c0d

args = dict(