Adds sponsor model

db/migrate/20140605115251_create_sponsors.rb

@@ -0,0 +1,16 @@
+class CreateSponsors < ActiveRecord::Migration
+  def change
+    create_table :sponsors do |t|
+      t.string :name
+      t.text :description
+      t.string :website_url
+      t.string :logo_file_name
+      t.string :logo_content_type
+      t.integer :logo_file_size
+      t.datetime :logo_updated_at
+      t.belongs_to :sponsorship_level
+      t.belongs_to :conference
+      t.timestamps
+    end
+  end
+end