* add the desired fields to the table in dbconfig.  dbconfig/tasks.md contains the entries for rawExp and rawImfile
    M1_x        F32         0.0

 * add corresponding entries in the ippTool/src/regtoolConfig.c file
    psMetadataAddF32(addprocessedimfileArgs, PS_LIST_TAIL, "-M1_x", 0, "define M1 X position", NAN);
    psMetadataAddF32(addprocessedexpArgs, PS_LIST_TAIL, "-M1_x", 0, "define M1 X position", NAN);

 * add the entries (in ippTool/src/regtool.c) to the newToRaw functions and the corresponding row alloc (the new RowAlloc api will give a compile time error if the correct entries are not added.
    psF32 M1_x = psMetadataLookupF32(&status, config->args, "-M1_x");

 * define the header translations in the ippconfig/CAMERA/format*.config (TRANSLATION METADATA)
  FPA.M1X         STR     M1X

 * add the corresponding entry to the ippconfig/recipes/ppStats.config file (REGISTER METADATA)
  CONCEPT       STR     FPA.M1X         # Primary x position

 * add the corresponding entries to the STATS structure in register_imfile.pl and register_exp.pl
  { name => "FPA.M1X",        type => "constant", flag => "-M1_x",            dtype => "float"  }, # M1X

 * add the new concepts to psModules/src/concepts/pmConcepts.c
  psMetadataItem *item = psMetadataItemAllocF32("FPA.M1X", "Primary Mirror X Position", NAN);
  pmConceptRegister(item, NULL, NULL, false, PM_FPA_LEVEL_FPA);
  psFree(item);