feat(button): support angular-new-router ng-link

[Spadavecchia]

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[googlebot]

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[Spadavecchia]

I signed it!

On Tue, Apr 21, 2015 at 11:45 PM, googlebot notifications@github.com
wrote:

Thanks for your pull request. It looks like this may be your first
contribution to a Google open source project, in which case you'll need to
sign a Contributor License Agreement (CLA).

[image: 📝] Please visit https://cla.developers.google.com/
https://cla.developers.google.com/ to sign.

Once you've signed, please reply here (e.g. I signed it!) and we'll

verify. Thanks.

• If you've already signed a CLA, it's possible we don't have your
  GitHub username or you're using a different email address. Check your
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• If you signed the CLA as a corporation, please let us know the
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#2478 (comment).

[googlebot]

CLAs look good, thanks!