[Request] Add ngGallery

[cedx]

Library name: ngGallery
Git repository url: https://github.com/SchwarzwaldFalke/ngGallery.git
npm package url(optional):
License(s): MIT
Official homepage: http://demo.jankuri.com/ngGallery
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Notes from cdnjs maintainer:
Please read the README.md and CONTRIBUTING.md document first.

You are welcome to add a library via sending pull request,
it'll be faster then just opening a request issue,
and please don't forget to read the guidelines for contributing, thanks!!

[cedx]

I close this issue : it seems that the library author does not want to be hosted on CDNJS :)