code: function(buildPath, manifest) {
      fs.stat(manifest, function(err, stat) {
          if (! err) {
              manifest = JSON.parse(fs.readFileSync(manifest));
  
              for (var key in manifest) {
                  del.sync(buildPath + '/' + manifest[key], { force: true });
              }
          }
      });
  }
docs: Empty all relevant files from the build directory.
  
  @param  {string} buildPath
  @param  {string} manifest