Better handling of null glyphs and empty groups.
Fixed a problem calculating CIR block sizes.
Basic support for leaping on quantitative tracks.
Logging cleanups.
Abbreviations when typing locations.
No longer fails on second attempt to get seq length.
Catch exceptions when launching fetches.
Store status after adding and removing tiers.
Fixed drag-to-scroll bug
Better control of popups
Merge remote-tracking branch 'origin/0.8.x'
Fixed race in stylesheet load.
Enable quant overlay for POINTS.
Quant-leap improvements.
Nicer sequence-position labels.
Better quantleap.
Properly handle multiple tiers backed by the same datasource when removing tiers
No longer fails on second attempt to get seq length.
Somewhat better chrN vs N canonicalization.
Merge branch '0.8.x'

Conflicts:
	js/browser-ui.js