Fix problem with VCF calls multiple insertion and/or deletion events at a given position.
Uses bcftools norm to do the splitting.
- From haplotype
5 112174757 . GAAGA G,GGA
- after bcftools norm -m-
5 112174757 . GAAGA G
5 112174757 . GAAGA GGA
- after normalizeInDels.py
5 112174757 . GAAGA G
5 112174757 . GAA G