def find_css(path = @path)
        Dir.glob(path).select { |f| File.file? f }.map { |file| file }
      end
def find_css(path = @path)
        Dir.glob(path).select { |f| File.file? f }.map { |file| file }
      end
Find all css files
 @param path [String] globbed file path
 @return [Array] paths to compiled CSS files