Calculate FST values across sliding windows
Name_tab_Lineage.tab contains:
isolate1 ST1 isolate2 ST1 isolate3 ST2 isolate4 ST2 isolate5 ST2 isolate6 ST3
etc,
To compare ST1 to ST2:
perl VCF-multi-sample-to-FST-windows.pl -a Name_tab_Lineage.tab -v Multi_sample.VCF -c ST1 -d ST2 -r reference.fasta > out.window-10kb.tab