This is a subclass of Catalyst::Request that applies the
Catalyst::TraitFor::Request::REST role to your request class. That trait
adds a few methods to the request object to facilitate writing REST-y code.
This class is only here for backwards compatibility with applications already
subclassing this class. New code should use
Catalyst::Action::REST and Catalyst::Controller::REST will arrange
for the request trait to be applied if needed.