Improve warns() test helper to better handle multiple calls
Merge pull request #2421 from wecc/warns-test-helper-improvement

Improve warns() test helper to better handle multiple calls
failing test for #2007
Merge pull request #2422 from emberjs/belongsToIsLoadedTest

failing test for #2007
Don't allow empty strings as id in push/update
Merge pull request #2423 from wecc/no-empty-string-id-in-push

Don't allow empty strings as id in push/update
Relationship rollback from created state
Merge pull request #2425 from emberjs/disconnect_relationships_on_created_rollback

Relationship rollback from created state
Use the model rollback and not state machine for created records rollback
Merge pull request #2426 from emberjs/disconnect_relationships_on_created_rollback

Use the model rollback and not state machine for created records rollbac...
[DOCS] InvalidError docs missing quote
Merge pull request #2427 from craigteegarden/patch-1

[DOCS] InvalidError docs missing quote
Ensure production builds do not use require internally.
Merge pull request #2429 from rwjblue/derequire

Ensure production builds do not use require internally.
RestAdapter's buildUrl from delete can ask for record's relations. closes #534
Merge pull request #2436 from sly7-7/rest-adatpter-build-url-delete

RestAdapter's buildUrl from delete can ask for record's relations.
update contributing links

- Handlebars 2.0 with canary builds
- Use the correct canary build URL
Merge pull request #2441 from sly7-7/update-contributing-links

Update contributing links. Closes #2440
Removing outdated example from DS.Store documentation. #2442
Merge pull request #2444 from cohitre/storeDocumentation

Removing outdated example from DS.Store documentation. #2442