We should pass the right key in to addRelationships methods
Fixes #386, Fixes #415, Fixes #404, Fixes #206: Incorporate default transforms to RESTAdapter

* Created integration test for default DS.Transforms
* Added unit test for models for default DS.Transforms (commented out some of the tests, see #421) from: 8a812c8
* Modified transforms.js to use DS.Transforms namespace
* Modified transforms.js to use fromJSON/toJSON instead of to/from
* Modified serializer to create an instance of DS.Transforms for it's default transformations instead of using the passthrough hack
* Modified transforms.js to have a little bit of logic in boolean transform
Add record unloading support

Add unloadRecord() method to record instance aand to the store.
We also unlaod records when they are deleted and saved.
Add contributing.md
Merge pull request #439 from mhelabs/contributing_docs

Add contributing.md
call this.didSaveRecord

This seems have been forgotten in the commit https://github.com/emberjs/data/commit/7ea66038d0f32668024860b1916e7596ad911ff1
As a result deleting a child did not result a clean parent :/
Merge pull request #444 from sly7-7/patch-1

RESTAdapter: call this.didSaveRecord on didDeleteRecord
add test
Merge branch 'master' into serializer-association-name

* master:
  call this.didSaveRecord
  Add contributing.md
  Finish fixing relationship bug
  Revert "Revert "Fix for relationship acknowledgement issues""
  Revert "Fix for relationship acknowledgement issues"
  Fix for relationship acknowledgement issues
  Remove reference to hidden ember-data guide
  Remove 'cacheable' calls since caching is always default now
  Upgrade to Ember HEAD
  Added note about CORS
  Using stateManager.currentPath
  Reset default transaction from the transaction itself and not from the store
  fix model namespace in transaction examples
  update license.js [ci skip]
  Don't assign the store to controllers that haven't been instantiated. See https://github.com/emberjs/ember.js/pull/1269
  Fix typo
  Indent; typos; bump revision
  Allow RESTAdapter to find records by an ID alias
  added missing didDelete method documentation on Readme
  Set custom URL on the REST adapter
add a test that passes with this PR but fails in master

Note the FIXME included illuminating another bug, which is a
known issue
WIP on adding per-type serializers and adapters
Make DS.RESTSerializer a class and add some tests
Merge pull request #447 from shwoodard/master-with-serializer-association-name

Add test for #418
Adding untracked files.
Merge branch 'master' of github.com:emberjs/data
Revert per-type serializers
Add documentation for Mappable mixin
Include ids when doing a bulk update
Use DS.Serializer#serializeId in bulk delete for building array of ids
Add assertions for isLoaded flag on ManyArray of findMany