Added displayList for windows

[gameoverhack]

Adds display list functionality for windows (ie., getDisplays now works).

On another note:

Noticed setWindowPosition is not working (at least on windows) -> does it work correctly on linux and mac?

Will look into it if it works elsewhere...

[underdoeg]

Hey thanks for your contribution. Looking good!
Yes, setWindowPosition works on linux and mac. But I had to add it to ghost myself. So win is probably not ready yet. Does setting an initial window position work though?

[underdoeg]

just checked the ghost code and yes, it is not in yet. https://github.com/underdoeg/ghost/blob/master/intern/GHOST_WindowWin32.cpp#L1360

I don't have acces to windows right now, but if you need it and want to give it a try, I think the following code will do the trick. (untested though)

GHOST_TSuccess GHOST_WindowWin32::setWindowPosition(GHOST_TUns32 x, GHOST_TUns32 y)
{
GHOST_Rect wBnds;
getWindowBounds(wBnds);
int cx = wBnds.getWidth();
int cy = wBnds.getHeight();
return = ::SetWindowPos(m_hWnd, HWND_TOP, x, y, cx, cy, SWP_NOMOVE | SWP_NOZORDER) ?
GHOST_kSuccess : GHOST_kFailure;
}