Implement QuickDraw for linux/mono

[borzel]

https://github.com/borzel/xenadmin/blob/linux-7.4/XenAdmin/Core/Drawing.cs

Instead of Win32-Call this works (in my prototype):

public static void QuickDraw (Graphics gTarget, Bitmap buffer)
{
    gTarget.DrawImage(buffer, new Rectangle(0, 0, buffer.Width, buffer.Height));
}

[borzel]

As I have no spare time I close this :-(