More environment routines
MPI_GET_PROCESSOR_NAME(name,resultlength,ierr)
   This is akin to the hostname command.
MPI_WTIME( ),MPI_Wtime( )
   This returns wall time in seconds as a double precision number .
MPI_WTICK( )
   Returns the clock resolution in real*8
MPI_ABORT(comm,errorcode,ierr)
    This can be used to halt the job cleanly when it is behaving
erroneously.
MPI_FINALIZE( )
     This should be the last call of an MPI code. It winds up the MPI
environment cleanly.