ActivateController returns a new controller type info description.

Register receives a "controller", a pointer of an instance which embeds the `Controller`, the value of "baseControllerFieldName" should be `Controller`.

RegisterMethodHandlers receives a `TController`, description of the user's controller, and calls the "registerFunc" for each of its method handlers.

ErrInvalidControllerType fired when the "Controller" field is not the correct type.

ErrMissingControllerInstance is a static error which fired from `Controller` when the passed "c" instnace is not a valid type of `Controller`.

BaseController is the controller interface, which the main request `Controller` will implement automatically.

RegisterFunc used by the caller to register the result routes.