Messages to completions conversion

spec/factories/messages.rb

@@ -3,6 +3,8 @@
 # Table name: messages
 #
 #  id           :integer          not null, primary key
+#  author       :string
+#  display_time :string
 #  text         :string           not null
 #  time_seconds :integer          not null
 #  created_at   :datetime         not null

spec/models/message_spec.rb

@@ -3,6 +3,8 @@
 # Table name: messages
 #
 #  id           :integer          not null, primary key
+#  author       :string
+#  display_time :string
 #  text         :string           not null
 #  time_seconds :integer          not null
 #  created_at   :datetime         not null