Fix incorrect documentation for isError.

If the server returns a validation error, then isError is not set to true.
Add a better transform example
[DOC] Fix docs for method signature of extractSingle, extractArray
Fixes a typo in the documentation of the serializeAttribute method of json_serializer.js
Specify language as Node.js on Travis CI

Without `language` section, Travis CI detects Ruby as build language:
* https://travis-ci.org/emberjs/data/builds/24150621#L18
Use npm-scripts to run test

* https://www.npmjs.org/doc/misc/npm-scripts.html
Merge pull request #1906 from tricknotes/install-grunt-on-travis

Fix failing test on Travis CI.
Cleanup scripts

* Remove old script `bin/cached-bundle`
* Fix to update comment for `bin/cached-npm`
Merge pull request #1907 from tricknotes/cleanup-scripts

Cleanup scripts
Add `repository` field to package.json

To suppress warning from npm:
```
npm WARN package.json ember-data@1.0.0-beta.7+canary No repository field.
```
Add `license` field to package.json
Merge pull request #1908 from tricknotes/add-repository-field-to-package.json

Add `repository` field to package.json
incase jQuery.ajax returns a null or undefined jqXHR
Remove incorrect semicolon from pathForType example.
Also changed the example to use .extend instead of reopen
Merge pull request #1918 from bmac/fix-pathfortype

Remove incorrect semicolon from pathForType example.
Merge pull request #1898 from bantic/extract-single-array-docfix

[DOC] Fix docs for method signature of extractSingle, extractArray
Merge pull request #1902 from abrinkman/master

Fixes a method documentation typo.
Merge pull request #1897 from alexspeller/fix-poor-transform-example

Add a better transform example
Merge pull request #1858 from jimmay5469/patch-1

Fix incorrect documentation for model.isError
[BUGFIX] Add missing support for belongsTo in DS.EmbeddedRecordsMixin

- active_model_serializer gem `has_one` setting allows embedding objects
- Add attrs options for serialize/deserialize using records or ids
- Add attrs options for not serializing relationships using serialize:no
-Add a hook called removeEmbeddedForeignKey for optional removal of foreign key reference from the embedded record