Merge branch 'refs/heads/snippets_expiration' into dev

Conflicts:
	db/schema.rb

db/migrate/20111027051828_add_expires_at_to_snippets.rb

@@ -0,0 +1,5 @@
+class AddExpiresAtToSnippets < ActiveRecord::Migration
+  def change
+    add_column :snippets, :expires_at, :datetime
+  end
+end

db/schema.rb

@@ -65,6 +65,7 @@ ActiveRecord::Schema.define(:version => 20111027142641) do
     t.datetime "created_at"
     t.datetime "updated_at"
     t.string   "file_name"
+    t.datetime "expires_at"
   end
 
   create_table "users", :force => true do |t|