ref #15 add screen info class
* implement getNumScreens
ref #15 add more screen infos for windows
ref #15 start on window class (windows for now)
ref #15 fix window proc redirect
ref #15 fix window style and windowed toggle
ref #15 add virtual window event handlers, revisit changing display settings
ref #15 add WindowEventHandler
ref #15 start on context and add example
ref #15 implement basic context creation and example