JBrowse 1.16.4

Minor improvements

• Added indexedFeatures tracklist attribute for GFF3Tabix track types
  which controls the feature types from a GFF3Tabix file that are
  indexed. Thanks to @loraine-gueguen for the idea and implementation!
  (pull #1337, @loraine-guegen)

• Added inferHTMLSubfeatures which automatically creates multiple
  mRNA transcripts from a single gene parent feature. Thanks to
  @abretaud for the idea and implementation! Note that this is enabled
  by default now (pull #1343, pull #1340)

• Updated jbrowse.org website to run entirely off amazon S3 (pull #1347,
  pull #1348)

Bug fixes

• Added better error reporting to GFF3Tabix tracks for if a parsing
  error occured. Thanks to @nathanhaigh for reporting (@cmdcolin)

• Added fix for VCF that don't contain alternative alleles (@cmdcolin)

• Added better error handling if there is a case where a tabix file is
  loaded that is on a genome longer than 2^29. CSI indexes are needed for
  this. Old versions of tabix which hadn't invented CSI would generate
  invalid tabix indexes in this case. Thanks to Hans Vasquez-Gross for
  reporting (@cmdcolin)

• Fixed link in documentation. Thanks @agarciamontoro (pull #1341)

• Fixed issue with ucsc-to-json.pl creating subfeatures with the wrong
  strand. Thanks to @sachalau for finding and fixing (pull #1346)