Allow belongs to associations to be saved when the associated object is null.
Remove accidentally added capitalize and camelize
DateTransform serialises into ISO8601 string
add test for multiwords typeKey
Batch hasMany requests with many id's to avoid max URL length issues
Brocfile: Adds hinting for node.

* Won't complain about `process` anymore.
Merge pull request #2174 from duggiefresh/jshint-brocfile

Brocfile: Adds hinting for node.
Adds JSHint globals.

* Adds semicolons.
Merge pull request #2175 from duggiefresh/lint-tests-files

Adds JSHint globals.
Merge pull request #1985 from bradleypriest/date

DateTransform serialises into ISO8601 string
Merge pull request #2159 from jcollins1991/split-large-get-requests

Split large get requests
Remove unused requires

This includes removeFile which is not referenced anywhere in the
Brocfile.  It also removes the top require for defeaturify which is
required locally within minify()
Merge pull request #2178 from rondale-sc/remove_unused_requires

Remove unused requires
Add support for JSONSerializer.attrs.key.serialize for `hasMany` and `belongsTo` relationships
Merge pull request #2142 from sly7-7/singularize-camelized-typekey

add test for multiwords typeKey
Substitute serialize:no to serialize:false in EmbeddedRecordsMixin
Merge branch 'fix-polymorphic-belongs-to-null' of github.com:Tiwalun/data into Tiwalun-fix-polymorphic-belongs-to-null

Conflicts:
	packages/activemodel-adapter/lib/system/active_model_serializer.js
	packages/ember-data/lib/serializers/rest_serializer.js
	packages/ember-data/tests/integration/serializers/rest_serializer_test.js
Merge branch 'Tiwalun-fix-polymorphic-belongs-to-null'
Merge pull request #2182 from loadimpact/json-serializer-serialize

Add support for JSONSerializer.attrs.serialize for relationships
[DOC] Add plural example for REST adapter.