* finished #6925
* augmented per @BrennanConroy
* fixed css link
* added method to hub
* added code from sample to file
* fixed user sample
* removed the email version of this sample
* removed last mention of the customization
* Minor edits
* added (and tested) claimtypes.email-supporting identity approach
* referencing code in sample instead of hard-typed
* fixed a dumb thing
* implemented all changes suggested by @tdykstra
* fixed suggestions from @scottaddie
* updated metadata
* Update ms.date
* tweaks implemented per @BrennanConroy
* Update heading
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