added task to retrieve tag frequency information

lib/tasks/tag_frequency_hash.rake

@@ -41,4 +41,12 @@ task generate_tag_frequency_hash: :environment do
   File.open("tag_frequency_hash.json", "w+") do |f|
     f << hash.to_json
   end
+
+  File.open("community_input.txt", "w+") do |f|
+    hash.each do |id1, ids2Hash|
+      ids2Hash.each do |id2, value|
+        f << "#{id1}, #{id2}, #{value} \n"
+      end
+    end
+  end
 end