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Developers guide-lines in PPM_RC coding

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• all FORTRAN keywords and statements are in capital letters

• functions and subroutines from PPM library called with ppm_ initiative, like:

  CALL ppm_util_time(t0)

• functions and subroutines from PPM_RC library called with ppm_rc initiative, like:

  `CALL ppm_rc_defaults(info)`
  

• functions and subroutines from MPI library called with MPI initiative, like:

  `CALL MPI_Init(info)`
  

• PPML macros called in small letters, like:

   `or_fail("ppm_rc_defaults failed")`
  
   `or_fail_MPI("MPI_Comm_Rank failed.")`
  
   `stdout("Initialization took: ",'tinit-t0'," secs.")`