help should describe accession number (#496)

FILENAMING.md

@@ -12,6 +12,7 @@ You request the output file name with the `-f` argument. For example, consider y
  - %d=description (from 0008,103E)
  - %e=echo number (from 0018,0086)
  - %f=folder name (name of folder containing first DICOM)
+ - %g=accession number (0008,0050)
  - %i=ID of patient (from 0010,0020)
  - %j=series instance UID (from 0020,000E)
  - %k=study instance UID (from 0020,000D)

console/main_console.cpp

@@ -88,7 +88,7 @@ void showHelp(const char * argv[], struct TDCMopts opts) {
     #else
      #define kQstr ""
     #endif
-    printf("  -f : filename (%%a=antenna (coil) name, %%b=basename, %%c=comments, %%d=description, %%e=echo number, %%f=folder name, %%i=ID of patient, %%j=seriesInstanceUID, %%k=studyInstanceUID, %%m=manufacturer, %%n=name of patient, %%o=mediaObjectInstanceUID, %%p=protocol,%s %%r=instance number, %%s=series number, %%t=time, %%u=acquisition number, %%v=vendor, %%x=study ID; %%z=sequence name; default '%s')\n", kQstr, opts.filename);
+    printf("  -f : filename (%%a=antenna (coil) name, %%b=basename, %%c=comments, %%d=description, %%e=echo number, %%f=folder name, %%g=accession number, %%i=ID of patient, %%j=seriesInstanceUID, %%k=studyInstanceUID, %%m=manufacturer, %%n=name of patient, %%o=mediaObjectInstanceUID, %%p=protocol,%s %%r=instance number, %%s=series number, %%t=time, %%u=acquisition number, %%v=vendor, %%x=study ID; %%z=sequence name; default '%s')\n", kQstr, opts.filename);
     printf("  -g : generate defaults file (y/n/o/i [o=only: reset and write defaults; i=ignore: reset defaults], default n)\n");
     printf("  -h : show help\n");
     printf("  -i : ignore derived, localizer and 2D images (y/n, default n)\n");