vigilab_intergeneShareGFF
(1) Parse in a GFF file, (2) Filter only rows matching a specific type (e.g. transcript), (3) Then print a new GFF file whose "start" and "end" fields are expanded to include intergenic regions whose sharing distribution differs according to pairwise strand orientations: (i) 1/3:2/3 ratio for tail:head (+,+) strands, (ii) 2/3:1/3 for head:tail strands (-,-), and (iii) 1/2:1/2 for head:head (-,+) and tail:tail (+,-) strands
