title: Disabling compass/scss source maps
body: <p>I'm using the latest versions of sass and compass and using gulp-compass to build. I'm getting <code>.map</code> sourcemap files even though I have set <code>sourcemap=false</code> in my config.rb file and have set the option <code>sourcemap:false</code> in the gulp-compass options. I would like to disable the sourcemaps at times in order to speed up the build. It takes roughly twice the time to run the gulp task when sourcemaps are generated. Any suggestions?</p>
  
  <p>config.rb:</p>
  
  <pre><code>http_path = "/"
  css_dir = "css"
  sass_dir = "sass"
  images_dir = "img"
  javascripts_dir = "js"
  sourcemap = false
  output_style = ":compact"
  </code></pre>
  
  <p>gulp.js:</p>
  
  <pre><code>gulp.task('compass', function() {
      return gulp.src(['sass/screen.scss', 'sass/screen_fallback.scss']).pipe(compass({
          config_file: 'config.rb',
          css: 'css',
          sass: 'sass',
          sourcemap: false
      })).on('error', function(err) {
          notify({
              message: err
          })
      }).pipe(notify({
          message: 'Compass processed.'
      })).pipe(minifycss()).pipe(rename({
          suffix: '.min'
      })).pipe(gulp.dest('css')).pipe(notify({
          message: 'CSS minified.'
      }));
  });
  </code></pre>