use ActiveRecord::Associations::CollectionAssociation.reader instead of proxy
Merge pull request #105 from pduey/rails4_query_api

use ActiveRecord::Associations::CollectionAssociation.reader instead of ...
Replace .all with .to_a

AR 4 has deprecated .all, we need to replace it with .to_a to avoid warnings
Merge pull request #110 from Shopify/remove_all

Replace .all with .to_a
Make serialization_format_change_test pass on rails 4. Change time format and update statement. Gen new serialized_record fixture. Did not bump cache version at this time.