Do not call adapter.deleteRecord for a record that is already saved and deleted.
Remove DS.AttributeChange.
Add an example of sending cookie information in the header and updated confusing reopen example.
Fix error assertion's message

This fixes the error message to reflect the changes described in [Defining Relationships in Models](https://github.com/emberjs/data/blob/master/TRANSITION.md#defining-relationships-in-models).
Fix incorrect documentation for isError.

If the server returns a validation error, then isError is not set to true.
Drop spurious var set statements
Bring back deprecated initializers

Libraries such as ic-ajax are dependent on the old initializers in
ember-data (such as "store"). This brings them back temporarially, but
they will eventually be removed and are non-functional.
Update error messages from push and update

Error messages now include model type for ease of debugging
Add examples to the DS.Errors api docs.
add bower to getting ember data section
Merge pull request #1882 from knownasilya/patch-1

add bower to getting ember data section
Update changelog for initializer and container setup changes
Merge pull request #1867 from mixonic/cleanup-initializers

Cleanup initializers
Fix validation comments for

- Api docs included comments on failing client-side validation
- DS.model doesn't have client side validation
- Only code that sets errors and changes  is a result
  of an invalid response from server
[DOC beta] Clarify adapter settings with ActiveModel::Serializers
allow saving records from invalid state

tests by @alexspeller
Import InvalidError instead of looking at global DS
Merge pull request #1891 from Kerrick/remove-reliance-on-global-ds

Import InvalidError instead of looking at global DS
Add a better transform example
[DOC] Fix docs for method signature of extractSingle, extractArray