@noelklein Thanks for the PR!

I'm curious if a better approach to this is to just pass in a directory to the Sass src files and let Sass do its magic (i.e., knowing that anything prefixed with _ is a partial and shouldn't compile a CSS file). A few concerns with this approach:

• We'd need to research if LESS supports this same logic by default (I don't think it does)
• I believe PostCSS is also pointing to specific files, so we need to address how parses the output files

Let's leave this open, but I want to research these alternate options because I do think support for more than one Sass/LESS file could be handy.