Added photo model

db/migrate/20140610064046_create_photos.rb

@@ -0,0 +1,13 @@
+class CreatePhotos < ActiveRecord::Migration
+  def change
+    create_table :photos do |t|
+      t.text :description
+      t.string :picture_file_name
+      t.string :picture_content_type
+      t.integer :picture_file_size
+      t.datetime :picture_updated_at
+      t.belongs_to :conference
+      t.timestamps
+    end
+  end
+end