Update graphics/psdrv/README. Add warnings to DRIVER_GetDriverName.
Moved some 16bit GDI function declarations from winspool.h -> wingdi16.h
Open/Get/ClosePrinter. Additions to PSDRV_DeviceCapabilities. Split off WINSPOOL into its own directory. Several functions added to DC_Funcs. Based largely on a patch by Pascal Lessard <pascal@macadamian.com>