update igv.js

this updates igv.js (thanks @juanesarango #21)

bed

v0.1.9

• handle empty lines in --sites file
• bump igv.js to 2.12.2
• warn when no genome or fasta is specified
• better for BED, e.g. show a bar for each bed region

annotations headers

v0.1.8

• always output header for --annotation files (fixes VCF)

change --template to --prefix

v0.1.7

change --template to --prefix

minor

v0.1.6

allow writing to stdout

add --template to support any number of variants

see: https://github.com/brentp/jigv#template

v0.1.5

• add --template option to allow for each variant or site to be written to a separte js (or base64) file.
  this allows a user to scale to as many variants as they like.

handle error on AB

v0.1.4

handle and report weird AD values

flank and linking

v0.1.3

• expose --flank option so user can specify size of flanking region to extract
• allow linking by chrom:pos:ref:alt (in addition to region chrom:start-stop)

minor ergonomic changes

v0.1.2

• if no --sample use first affected sample from pedigree file

bugfix and bed format

static binary below. just download, chmod +x and run (on linux)

v0.1.1

• support BED as input