Update for Handlebars 1.1
[DOC release] Add Ember.Application.testHelper documentation.
[FEATURE ember-testing-lazy-routing]

* `setupForTesting` sets the application into testing mode (which is
  used to defer readiness.
* Adds an initializer that defers readiness if the application is in
  testing mode.
* `visit` helper has been updated to advance readiness upon first call.
* `App.reset()` now behaves the same after `setupForTesting` (in a
  deferred state).
Merge pull request #3692 from rjackson/add_test_helpers_docs

[DOC release] Add Ember.Application.testHelper documentation.
Merge pull request #3695 from rjackson/defer_readiness_in_initializer

[FEATURE ember-testing-lazy-routing]
Renaming everyBy and anyBy to isEvery and isAny
Merge pull request #3662 from twokul/everyBy

Renaming everyBy and anyBy to isEvery and isAny
Support HANDLEBARS_PATH for Gemfile

This makes it easier for Ember's tests to be run against a
development version of Handlebars.
[DOC] Add ember-testing-lazy-routing to FEATURES.md.
Merge pull request #3697 from rjackson/add_docs_for_lazy_routing

[DOC] Add ember-testing-lazy-routing to FEATURES.md.