Initial stub of virtual monitor window
Fixed bad ident, and removed unecesary parameter on constructor
Retouches of interface and added a getter to int_queueing
Made to inheret of AbstractWindow base class that shared interface with
RenderWindow.
Event handling trasfered to Windows classes. F1, F2, etc... debug/VM control shortcuts handled now by sf::Keyboard::isKeyPressed, being independet of what windows have focus. They works if any have focus. F12 to toggle debug mode, now is Super/Windows/Apple + F12
Updated help info