code: function formatUpdates(processedUpdates) {
    var updates = {
      hashes: {}
    };
    _.each(processedUpdates, function(update) {
      var type = update.type;
      var hash = update.hash;
      updates.hashes[hash] = update;
      updates[type] = updates[type] || {};
      updates[type][hash] = update;
    });
    return updates;
  }
docs: Reformat the give processedUpdates array to an object format that is expected by the sync client
  @param {Array} processedUpdates the array of updates to process
  @returns {Object} an object that contains the updates with different types