Allow belongs to associations to be saved when the associated object is null.
Remove accidentally added capitalize and camelize
Add failing test for hasMany relationships

If adapter does not return any data for a hasMany relationship,
the unsaved hasMany records disappear from the relationship.
Fixes #1466
Always keep the hasMany around when payload arrives

We should always keep the current hasMany value if the payload
has no relationships with that key
[Bugfix] Decouple DS.EmbeddedRecordsMixin from DS.ActiveModelSerializer

[Fixes #1974]
adapt usage example for TemperatureTransform

Adapt usage example to reflect the TemperatureTransform. 'raw' doesn't make sense here as it is not registered as such.
Merge pull request #2014 from jwahdatehagh/patch-1

adapt usage example for TemperatureTransform
Better error for missing inverse on hasMany/belongsTo
Merge pull request #2016 from emberjs/pr2012Cleanup

Better error for missing inverse on hasMany/belongsTo
Fix class name in debugging message

`RestAdapter` should be `RESTAdapter`.
Merge pull request #2019 from tricknotes/fix-class-name

Fix class name in debugging message
Fixed a loose semicolon

Semicolon was unnecessary and causing a javascript error.
Merge pull request #2022 from rmartinez93/master

Fixed a loose semicolon
updated '_links' to just 'links'
Merge pull request #2024 from dadamssg/master

updated '_links' to just 'links'
fix documentation of `getById`
Merge pull request #2025 from Crunch09/master

fix documentation of `getById`
Merge pull request #1987 from pixelhandler/keyForAttribute-optional

[Bugfix] Decouple EmbeddedRecordsMixin from ActiveModelSerializer
fix documentation of 'attr'