Update etheme.js to add a custom header to async GETs as temporary workaround to bots.

  });

  if ($("#main_results").has(".first-page-media-results").length) {

    var headers = {"Content-Type": "application/json"};

    var headers = {"Content-Type": "application/json","X-e-async":"true"};

    var query_params = $.param({

      "format": "json",

      "q": $("#q").attr("value"),