Moved around files to separate OS X and X11 implementations.
Added GUI to explore timetracks
Continue reorganizing.
Pushed example data.
Pushed some various changes, I don't know, whatever man, here you go.
Modified JS to use "counted" data throughout.  Much, much faster.
Use human-readable durations.
Modified CSS to work better on narrow screens.
Fixed XSS, sort of accidentally.
Added binary search based slicing operation on time series.
Removed the global window.data; everything now takes a DATA attribute.
Per-day logs are now correct.
Fixed major bug in datetime_to_date.
mapPerDay is now a map, not a foreach.
Keep track of empty/skipped days
Added gutter of 1% on either side, just in case.
Clean up some minor nits.
Added self-check to display_blocks()
Pad blocks to full day.  Makes the bars line up (mostly).
Added heading for time span corresponding to a block.