class Sass::Importers::Filesystem

This should only be loaded in Rails 3.0 apps.
Rails 3.0.* and Rails 3.1
that are named *.css.scss. This allows us to be compatible with both
This monkey patches the SASS filesystem importer to work with files

def extensions_with_css

We want to ensure that all *.css.scss files are loaded as scss files 
def extensions_with_css
  extensions_without_css.merge('{css.,}scss' => :scss)
end