code: function GridTileAnimator(grid, tiles) {
      grid.element.css(grid.style);
      tiles.forEach(function(t) {
        t.element.css(t.style);
      });
    }
docs: Default Gridlist animator simple sets the css for each element;
  NOTE: any transitions effects must be manually set in the CSS.
  e.g.
  
  md-grid-tile {
  transition: all 700ms ease-out 50ms;
  }