Changing win32 native graphics buffer selection mechanism to use DescribePixelFormat so we can discriminate accelerated and non accelerated pixel formats and choose one ourselves.  Added lots of extra printf debugging used by defining DEBUG.  Fix up support for correctly listing pixel format attributes in 'gfx lis win *' for these win32 native graphics buffers.
Changing win32 native graphics buffer selection mechanism to use DescribePixelFormat so we can discriminate accelerated and non accelerated pixel formats and choose one ourselves.  Added lots of extra printf debugging used by defining DEBUG.  Fix up support for correctly listing pixel format attributes in 'gfx lis win *' for these win32 native graphics buffers.

cmiss/cmgui,cmiss/cmgui