code: function getNativeBracketsDirectoryPath() {
          var pathname = decodeURI(window.location.pathname);
          var directory = pathname.substr(0, pathname.lastIndexOf("/"));
          return convertToNativePath(directory);
      }
docs: Returns a native absolute path to the 'brackets' source directory.
  Note that this only works when run in brackets/src/index.html, so it does
  not work for unit tests (which is run from brackets/test/SpecRunner.html)
  
  WARNING: unlike most paths in Brackets, this path EXCLUDES the trailing "/".
  @return {string}