prefer Ember.create to Object.create

also removes methods not on array prototypes
in IE8 such as forEach

refs emberjs/ember.js#9430
fixes emberjs/data#2488
Merge pull request #2493 from emberjs/ie8-fixes-beta.12

prefer Ember.create to Object.create
make the Object.create assertion more specific
Merge pull request #2511 from emberjs/more-ie8-oo-create-fixes

make the Object.create assertion more specific
Add Test Coverage for `ember-data/transforms`

Transforms are not tested at the `unit` level. Adding tests at the
`unit` granularity allows for regression testing if the
implementation covered by the `acceptance` level tests should change.
Merge pull request #2509 from seanpdoyle/add-tests-number-transform

Add Test Coverage for `DS.NumberTransform`
changelog/ember add-on update; release beta.12
Add an example to the store.fetch docs
Merge pull request #2514 from bmac/fetch-example

Add an example to the store.fetch docs