in-passing cleanups and doc improvements
wip on hierarchical tracksel
style the hierarchical track sel
factor simple tracklist text filtering into a mixin, add it to Hierarchical track sel
update release notes
make hierarchical track sel the default
add --metadata arg to bam-to-json.pl
add `--metadata` arg to `flatfile-to-json.pl`
sort undefined categories in track meta store as if they were literally "Uncategorized"
categorize most of the volvox example tracks
bugfix to canvasfeatures histograms
make the hierarchical tracksel save the open/closed state of its
categories in localstorage, if the browser has it.
track sel styling tweaks
no need to round hist bar heights in canvasfeatures
bugfix to canvasfeatures hist bin sizing
more canvas hist bugfixes
tweak hierarchical tracksel for safari
more style tweaks for hierarchical tracksel
fix perl tests
fix selenium tests to work with hierarchical tracksel