Implement a Quartz 2D (aka Core Graphics) output renderer for the Wx
interface as a subclass of BasicDrawingPanel called
Quartz2DDrawingPanel.
Split BasicDrawingPanel's DrawArea() into DrawArea() and DrawImage(),
with DrawImage() receiving both the wxPaintDC and the wxImage, the
wxImage is created with a direct pointer to the frame buffer when
possible (24bpp).
Implement Quartz2DDrawingPanel in macsupport.mm based on the code here:
http://www.cocoabuilder.com/archive/cocoa/309165-how-to-quickly-paint-to-cocoa-view-from-bitmap-in-memory.html
and here:
http://stackoverflow.com/questions/2261177/cgimage-from-byte-array
the GetData() method of wxImage is used to avoid copying the frame
buffer.
Add RND_QUARTZ2D to the renderers enum and update all config stuff and
the XRC to support it. As well as the DrawingPanel instantiation code in
GameArea::OnIdle().
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