add symmetric difference to vcfintersect (-v flag)
add symmetric difference to vcfintersect (-v flag)

harshinamdar/vcflib,alimanfoo/vcflib,jewmanchue/vcflib,alimanfoo/vcflib,jewmanchue/vcflib,travc/vcflib,glennhickey/vcflib,alimanfoo/vcflib,alimanfoo/vcflib,zhmz90/vcflib,zeeev/vcflib,wzugang/vcflib,harshinamdar/vcflib,ekg/vcflib,glennhickey/vcflib,harshinamdar/vcflib,vcflib/vcflib,andersje/vcflib,andersje/vcflib,travc/vcflib,glennhickey/vcflib,andersje/vcflib,tomdcsmith/vcflib,zeeev/vcflib,jewmanchue/vcflib,jewmanchue/vcflib,glennhickey/vcflib,zhmz90/vcflib,hyphaltip/vcflib,vcflib/vcflib,ashishjain1988/vcflib,ashishjain1988/vcflib,zeeev/vcflib,vcflib/vcflib,hyphaltip/vcflib,ashishjain1988/vcflib,vcflib/vcflib,zhmz90/vcflib,ekg/vcflib,alimanfoo/vcflib,ashishjain1988/vcflib,vcflib/vcflib,zhmz90/vcflib,glennhickey/vcflib,wzugang/vcflib,harshinamdar/vcflib,harshinamdar/vcflib,vcflib/vcflib,jewmanchue/vcflib,andersje/vcflib,ashishjain1988/vcflib,harshinamdar/vcflib,vcflib/vcflib,ekg/vcflib,vcflib/vcflib,alimanfoo/vcflib,zeeev/vcflib,hyphaltip/vcflib,glennhickey/vcflib,ekg/vcflib,travc/vcflib,zhmz90/vcflib,ekg/vcflib,ashishjain1988/vcflib,andersje/vcflib,andersje/vcflib,zeeev/vcflib,jewmanchue/vcflib,zhmz90/vcflib,tomdcsmith/vcflib,hyphaltip/vcflib,hyphaltip/vcflib,zeeev/vcflib,wzugang/vcflib,wzugang/vcflib,hyphaltip/vcflib,tomdcsmith/vcflib,wzugang/vcflib,wzugang/vcflib