DIO__Initialize (ul_pbar_dio)

 *  Synopsis:
 *    #include <ul_pbar_dio:dio.h>
 *
 *    int DIO__Initialize( void )
 *
 *  Function intent:
 *    DIO__Initialize() initializes the DIO I/O system.  At this time it
 *    simply initializes diagnostic output if enabled.
 *  Function parameters:
 *    none
 *  Function return value:
 *    CBS_OK		command successfully written