docs(ngCsp): Universal Windows Apps added

[palermo4]

It is necessary for this directive to be enabled when developing Universal Windows Apps written in JavaScript using Angular

[mary-poppins]

I'm sorry, but I wasn't able to verify your Contributor License Agreement (CLA) signature. CLA signature is required for any code contributions to AngularJS.

Please sign our CLA and ensure that the CLA signature email address and the email address in this PR's commits match.

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[palermo4]

I have signed the CLA and the email's match. Do I need to do another pull request?

[mary-poppins]

CLA signature verified! Thank you!

Someone from the team will now triage your PR and it will be processed based on the determined priority (doc updates and fixes with tests are prioritized over other changes).

[caitp]

The problem is that "Universal Windows App" is just an extremely generic name (not much of a brand name even) so I think this is kind of confusing. "Windows Store App" or something might be more recognizable.

WDYT?

[palermo4]

It is the name for apps that can target multiple device types (PC, phone). It is the name, and is branded accordingly. http://blogs.windows.com/buildingapps/2014/07/24/introduction-to-universal-windows-apps-in-windows-8-1-and-windows-phone-8-1/