Fix Integration: Recognize clicks from components that use href-to (ember-paper)

[openhouse]

I want to use href-to with a component from https://github.com/miguelcobain/ember-paper that renders an anchor element.

{{#paper-button href=(href-to "settings") class="href-to"}}Settings{{/paper-button}}

I am able to use the href-to helper to set the href attribute on the component, which renders as expected. Great!

<a id="ember736" tabindex="0" href="/settings" class="href-to ember-view paper-button md-default-theme md-button md-ink-ripple">  Settings
<div class="md-ripple-container"></div></a>

But with this, href-to didn't recognize when I clicked the link. I got the hard native browser redirect rather than a nice Ember router transition. It was because every component's element gets the .ember-view class which didn't fit the conditions in href-to's initializer.

So I made this pull request to update the initializer. Now href-to recognizes and smoothly transitions clicks on anchor elements when they have the .href-to class even if they are components.

To stay out of the way, href-to continues to not intervene when there is an action set on an element.