Nend amp-ad support.

[nend-net]

Could you merge 'Nend amp-ad support' into ampproject/amphtml master branch?

We have a Google Corporate CLA.
Our CLA: F@N Communications, Inc.
Our company name: F@N Communications, Inc.

Thank you in advance

[googlebot]

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

📝 Please visit 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 existing CLA data and verify that your email is set on your git commits.
• If you signed the CLA as a corporation, please let us know the company's name.

[googlebot]

CLAs look good, thanks!

[dvoytenko]

Could you please check the permitted values using checkData from the 3p module?

Is data-nend_params required? If so - could you please verify its existence via validateDataExists in the same module?

[dvoytenko]

@nend-net This looks great. Just a couple small comments. PTAL.

[nend-net]

@dvoytenko
Thank you for your advice.　
I modified the source and pushed to ’nend-net:master' branch a minutes ago.
Could you check my commit again?

[dvoytenko]

@nend-net Thanks! Merging.

[nend-net]

@dvoytenko Thanks a lot!