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Changes to basic EPOS source tree
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+ Added 'parport' mediator with implementation
  IEEE_Parport_PC

  $EPOS/include/parport.h
  $EPOS/include/parport_config.h
  $EPOS/include/system/mediators/parport/common.h
  $EPOS/include/system/mediators/parport/ieee_parport_pc*.h

  $EPOS/src/system/mediators/parport/ieee_parport_pc*.cc

+ Added 'Parallel_Device' abstraction (a Device)

+ Added 'CrossOverParallelDevice' abstraction (a Parallel_Device)

+ Added aplication to test CrossOverParallelDevice

