Add "redirector" property on "FormRequest"

Adding missing "redirector" property, that is accessed from "FormRequest::setRedirector" method. This would allow to have correct IDE auto-complete on that property within that class.
Merge pull request #5983 from aik099/add-redirector-property-on-form-request

[5.0] Add "redirector" Property On "FormRequest"
Simplifying routing. Allow POPO controllers.

The only controller base class and controller dispatcher will be moved
to a separate “legacy” composer package for 4.x upgrades. This will use
the new illuminate.routing.disptacher custom container hook to register
a custom dispatcher to provides backwards compatibility with those
using the 4.x container base class.
Merge branch 'controller-routing'
Get rid of some proxy methods.
Continuing to work on routing. Introduce middleware stack.
new router.
Working on middleware.
Write a base app service provider.
Fix stack.
Extract method.
Set doc blocks.
Simplify.
Middleware make command.
Fix a couple of bugs.
Remove unneeded files.
Fix app:name for middleware.
Remove old file.
Set the container before running.
Doc block.