Return sample name from samples.download().
Update references to renamed jam.samples.
Set tab width to 2 in editor.
Move editor down to make space for volume/level meters.

...and maybe a toolbar, soon?
Tolerate whitespace in HUD regexes.
Move event.vars.duration -> event.duration.
Don't create superfluous wait events for notes.
Support tempo changes in the transport sequencer + looping fixes.
Ensure that all events have a vars object.