allow users to set which field(s) in a feature hold its description, by making the HTMLFeatures "description" conf var settable to a comma-separated list of field names.
avoid using dojo.connect in InfoDialog
remove the suppressUsageStatistics from jbrowse_conf.json
add release note about the plugin system
add Alignments2 as a known track type for local files, and make it the default for BAM tracks
update quick-start tutorial to recommend the `Alignments2` track type for BAM
polished some prose in the release notes