Enable more pushing of more attributes

Author: njall

lib/tess/api/material.rb

@@ -23,8 +23,8 @@ def initialize(params = {})
         params[:last_scraped] = Time.now
         params[:scraper_record] = true
         # TODO: Check if this is really necessary:
-        [:scientific_topic_names, :package_ids, :keywords, :contributors,
-         :authors, :target_audience, :node_ids].each do |attr|
+        [:scientific_topic_names, :operation_names, :package_ids, :keywords, :contributors,
+         :authors, :target_audience, :node_ids, :external_resources_attributes].each do |attr|
           params[attr] = [params[attr]].flatten.compact
         end