Ember.js v2.9.0-beta.1 发布，JavaScript 框架

Ember.js v2.9.0-beta.1 发布了，Ember是一个雄心勃勃的Web应用程序，消除了样板，并提供了一个标准的应用程序架构的JavaScript框架。本次更新如下：

#14009 [BUGFIX] Fix usage of role when used in attributeBindings.
#14044 / #14062 / #14066 [BUGFIX] Update router.js so that getHandlers is invoked lazily.
#14054 [BUGFIX] Ensure substates properly work with resetNamespace.
#14033 [BUGFIX] Ensure fillIn acceptance test helper only sets value to first matched element.
#14058 [BUGFIX] Fix issues related to Ember.Router.map changes in 2.7.0.
#14068 [BUGFIX] Prevent errors when clicking a {{link-to}} during an existing transition.