Revert "Revert "implement post keepers""

This reverts commit b9fcfe0442.

db/migrate/20180116001101_add_keeper_data_to_posts.rb

@@ -0,0 +1,5 @@
+class AddKeeperDataToPosts < ActiveRecord::Migration
+  def change
+    add_column :posts, :keeper_data, :text
+  end
+end