* Add an IDataProtectionBuilder interface and move methods on DataProtectionConfiguration
to extension methods on IDataProtectionBuilder.
* Make AddDataProtection return an IDataProtectionBuilder instance for further configuration.
* Make AddDataProtection take in an action with a GlobalConfigurationOptions parameter instead
of a DataProtectionConfiguration parameter.
* Make DataProtectionProvider static
* Remove ConfigureGlobalOptions
* Change Option suffix in classes that are not actually options to Settings.
* Add extension method for configuring key management options.
* Cleanups.