Update the cache builder macros to store the associated class in the options for later reference
Actually give the test Record fixture model a record_id column, since it has a `belongs_to :record`
Add a "assert_memcache_operations" block helper for asserting how many
times memcache is hit during the block.
Spike out requested association prefetching on fetch_multi
Ensure belongs_to prefetches are only done if the foreign key is present
Make association prefetching recursive down the tree
Rename hash back to what I accidentally changed it to. This hash points from a child_id to a parent record.
Break out batch association fetching tests into its own file for less hair pulling.
Add support for prefetching non-embedded associations deeply nested under embedded has_many and has_one associations
Fix typo in the test helpers
Merge pull request #32 from Shopify/batched_association_fetches

Deep association batch prefetches