Added photo model

spec/factories/photos.rb

@@ -0,0 +1,12 @@
+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :photo do
+    picture_file_name 'rails.png'
+    picture_content_type 'image/png'
+    picture_file_size '1024'
+    picture_updated_at DateTime.now
+    description 'Lorem Ipsum Dolor'
+    conference
+  end
+end