old_contents: /**
   * The MIT License (MIT)
   *
   * Copyright (c) 2015 Mickael Jeanroy
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  /* global Grid */
  /* global $renderers */
  /* global $comparators */
  /* global $parsers */
  
  var Waffle = {
    // Make Grid constructor available.
    // This is deprecated, create function should be used instead.
    // @deprecated
    Grid: Grid,
  
    // Get default options
    options: Grid.options,
  
    // Create new grid
    create: Grid.create,
  
    // Add new "global" renderer
    addRenderer: function(id, fn) {
      $renderers[id] = fn;
      return Waffle;
    },
  
    // Add new "global" comparator
    addComparator: function(id, fn) {
      $comparators[id] = fn;
      return Waffle;
    },
  
    addParser: function(type, fn) {
      $parsers.$add(type, fn);
      return Waffle;
    }
  };
  
new_contents: /**
   * The MIT License (MIT)
   *
   * Copyright (c) 2015 Mickael Jeanroy
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  /* global Grid */
  /* global $renderers */
  /* global $comparators */
  /* global $parsers */
  
  const Waffle = {
    // Make Grid constructor available.
    // This is deprecated, create function should be used instead.
    // @deprecated
    Grid: Grid,
  
    // Get default options
    options: Grid.options,
  
    // Create new grid
    create: Grid.create,
  
    // Add new "global" renderer
    addRenderer: (id, fn) => {
      $renderers[id] = fn;
      return Waffle;
    },
  
    // Add new "global" comparator
    addComparator: (id, fn) => {
      $comparators[id] = fn;
      return Waffle;
    },
  
    addParser: (type, fn) => {
      $parsers.$add(type, fn);
      return Waffle;
    }
  };
  
subject: migrate Waffle to es6