Show dates as day-of-week, when in ‘week’ mode.

[ELLIOTTCABLE]

Probably just needs a .strftime('%A') in there, somewhere. Spelunked around a little, but I'm not much of a Pythonista, and I couldn't figure out how to do it.

But, anyway: when showing week-long graphs, data is much prettier when each item has the day of the week it applies to, instead of cryptic ISO dates.