Update "Underscored Keys, `_id` and `_ids`" section

ActiveModelSerializer is finished and works like magic.

Furthermore, the previous code was not enough to make ember data work with underscored attributes (see issue #1428)
Merge pull request #1437 from cibernox/patch-1

Update "Underscored Keys, `_id` and `_ids`" section
[doc] add inline doc for optional query in store.filter
Merge pull request #1444 from sly7-7/patch-2

[doc] add inline doc for optional query in store.filter
Bump version
Update `ember-dev` to (b0b12c4).

Updates `ember-dev` to (b0b12c4) which includes the following changes:

* Will not attempt to `unshallow` a full git repo
* Makes default test suite (packages only) run with features enabled and
  disabled.
* Fixes bug where the wrong Project name is used in the auto-generated
  CHANGELOG.
* Allows overriding the build type. (Simply set `ENV['BUILD_TYPE']='canary'`)
* Add `ember:generate_static_test_site` task to create a static HTML
  file for running the test suite.
* Add custom test results gathering for use in cross-browser testing.
* Make sure that the test file being used in the `Assetfile` is prefixed
  with the proper dasherized project name (prior to this Ember Data
  tests were still named `ember-tests.js` and now they will be
  `ember-data-tests.js`).
* Fixes issue where local `rake test` runs would attempt to perform git
  operations (`checkout` and `cherry-pick`). Now git operations will
  only be attempted if `ENV['CI']=true`.

For further reference:

https://github.com/emberjs/ember-dev/compare/0c0743979a...b0b12c4758e26
Merge pull request #1452 from rjackson/update_ember-dev

Update `ember-dev` to (b0b12c4).
Generate static site tests.

This will publish a ember-tests.html static test site along with the
builds. This makes it extremely simple to test the latest
canary/beta/release builds on various devices. It is also critical to
the cross-browser testing that we have been working on.
Merge pull request #1453 from rjackson/static_test_generator

Generate static site tests.
Ensure that async hasMany is always a promise
Update rest_adapter.js

Cleared up some ambiguity in the comments around createRecord and deleteRecord
Use consistent versioning.
Merge pull request #1456 from rjackson/use_consistent_versioning

Use consistent versioning.
Merge pull request #1455 from eccegordo/patch-3

Update rest_adapter.js
Minor documentation fix
Documentation Update rest_adapter.js

Went through the file and did a little more word smithing, making more consistent the description of HTTP methods used.
Documentation Update active_model_adapter.js

Added some description of the use of camelization, decamelization and plurizalization methods.

Added more detail on how pathForType works

Added some information about 422 HTTP responses.
Merge pull request #1462 from eccegordo/patch-5

Update active_model_adapter.js
Merge pull request #1461 from eccegordo/patch-4

Update rest_adapter.js
Update to Ember 1.1.0 (and fix tests).

Updated Gemfile to use 1.1.0 (latest stable version of Ember).

Ember 1.1.0 does not allow items to be re-registered on a container if
they have already been looked up. This change was made
[here](https://github.com/emberjs/ember.js/commit/b8b9878bcf6517ee2b25b0e309f2a5bf5e3ff7d1).

This refactors the tests for `DS.Store#push` so that it does not throw
an errors with 1.1.0.