skip comments in selectors counting

Hello,

In previous version, the CSS selectors counting could differ when your file contents comments (with comma) or not. With Compass/SASS pre-processor, every selector could be prefixed by a comment to identify the origin of declaration, eg :

    /* line 42, sass/_base.scss */
    a { color:red }

This comments are not necessary in production mode, and if CSS selectors counting mismatch between dev and prod, we are unable to predict the css filenames (mandatory when using --no-imports flag).

Hope this help.

Regards,