1.3.1

• locus: add --phasediff to plot difference between phases as output
• locus: add --hidelegend
• segplot: add --vertlabel (vertical labels)
• region: add --bed
• region, locus: add --hidebedlabel
• locus: add --csi (#87)
• locus: bounds checking for highlight region
• wgmeth: avoid crash on read not found