[BUGFIX beta] Do not deprecate the block form of {{render}}.

Fixes #4221.
Simplify code for action helper

Functionality remains exactly the same.
upgrade QUnit -> 1.13.0
Add templateName documentation for Ember.Route

Fixes #4234
such OCD
[DOC beta] Cleanup outdated comment for Ember.set.
Update route-recognizer

The updated route-recognizer no longer relies on Array.isArray(). Should help with IE8 compaitability.
[FEATURE ember-routing-inherits-parent-model] Route inherits parent's model by default.