Move Site Extension to nuget.org

[davidebbo]

Please see Azure/app-service-announcements#87 for detailed announcement.

Important: if your site extension is still relevant, you need to do this before June 1st 2018. Please let me know if you have any questions.

Thanks!

[aaronhoffman]

package updated, published to nuget.org, delisted from siteextensions.net

https://www.nuget.org/packages/AspNetUserMaintenanceAzureSiteExtension/

https://www.siteextensions.net/packages/AspNetUserMaintenanceAzureSiteExtension/0.0.1

[davidebbo]

That was fast, thanks!