fix SNAP mmap large fq issue
remove combined fq after use
fix bug: failure to find snap by Build
use interleave_fastq to replace interleave_fastq.py to avoid argparse dependency issue
Merge pull request #19 from WangGenomicsLab/fix_wgs

Fix wgs
backup
Vt working, installation not added yet
Vt installation added and tested
Merge pull request #20 from WangGenomicsLab/add_left_normalization

Add left normalization
Merge branch 'pre_release' into add_vcf_stat