Register a blueprint on the application.

        :param blueprint: Blueprint object
        :param options: option dictionary with blueprint defaults
        :return: Nothing

def blueprint(self, blueprint, **options):
        '''Register a blueprint on the application.

        :param blueprint: Blueprint object
        :param options: option dictionary with blueprint defaults
        :return: Nothing
        '''
        if blueprint.name in self.blueprints:
            assert self.blueprints[blueprint.name] is blueprint, \
                'A blueprint with the name "%s" is already registered.  ' \
                'Blueprint names must be unique.' % \
                (blueprint.name,)
        else:
            self.blueprints[blueprint.name] = blueprint
            self._blueprint_order.append(blueprint)
        blueprint.register(self, options)