Changes

   #variants that are normalized will be annotated with an OLD_VARIANT info tag.

   #variants that are normalized will be annotated with an OLD_VARIANT info tag.

   #CHROM  POS      ID  REF          ALT  QUAL  FILTER  INFO

   #CHROM  POS      ID  REF          ALT  QUAL  FILTER  INFO

   19   29238772 . C            G    .    PASS VT=SNP;OLD_VARIANT=19:29238771:TC,TG

   19   29238772 . C            G    .    PASS VT=SNP;OLD_VARIANT=19:29238771:TC/TG

   20   60674709 . GCCCAGCCCCAC  G    .    PASS VT=INDEL;OLD_VARIANT=20:60674718:CACCCCAGCCCC,C

   20   60674709 . GCCCAGCCCCAC  G    .    PASS VT=INDEL;OLD_VARIANT=20:60674718:CACCCCAGCCCC/C

   #this shows a sample output with the normalization operations that were used  

   #this shows a sample output with the normalization operations that were used