This change removes a layer of abstraction. These validators now just do
what they do now without creating a bunch of intermediate objects.
ModelClientValidationRule has been removed, and client validations
manipulate the attributes collection of a tag directly.
* Added a Release method to IControllerActivator
* Changed Create in IControllerActivator to take in a ControllerActionContext
* Move the check to determine if a controller can be instantiated into the controller activator.
* Move logic for disposing controllers into the controller activator and make release on the
controller factory delegate into the activator.
* Changed release methods to take in a controller context.
Ryan Nowak
Ajay Bhargav Baaskaran
jacalvar
Pavel Krymets
N. Taylor Mullen