The server modification for Stylus support

Chamaleon-stylus.m

    if (!path.existsSync(localFile)) {
      response.writeHead(404);
      response.end();
      return;
    }

    fs.readFile(localFile, function(error, content) {
      if (error) {
        response.writeHead(500);
        response.end();
      } else if (path.extname(localFile).toLowerCase() == '.styl') {
        var result = '';
        var str = require('fs').readFileSync(localFile, 'utf8');
        stylus.render(str, { filename: path.basename(localFile) }, function(err, css){
            if (err) {
                response.writeHead(500);
                response.end();
            }
            console.log(css);
            result = css;
        });
        // Chameleon is currently only designed to support css.
        response.writeHead(200, { 'Content-Type': 'text/css' });
        response.end(result, 'utf-8');
    } else {
        response.writeHead(200, { 'Content-Type': 'text/css' });
        response.end(content, 'utf-8');
      }