REST Adapter payload stuff
Make serializer respect primaryKey/attrs
Add findAll plus request-type-specific extracts
Add findAll, findMany and findQuery to RESTAdapter
Fix tests
Inject the default DS.Store if none is provided
Added support for URL lookups
Move extraction layers to adapter
Explain what extractSingle is doing
Add support for singular names in REST payloads
Update ember-dev to allow for stable builds.
Merge pull request #1130 from rjackson/allow_stable_builds

Update ember-dev to allow for stable builds.
Fix typo
Merge pull request #1131 from hrysd/typo

Fix typo
Some cleanup and error tests
Clean up error state

Instead of a state, it's now a flag that can be used for UI, but the
semantics of an errored record is just `loading` for records in the
process of being found or `uncommitted` for records that failed to save.
Cleanup
More cleanup
Remove leftover serializer code
Remove unnecessary usage of references