[kronolith] Reimplement column spanning in DayView and WeekView (commit please)

[Chuck Hagenbuch]

Quoting Jeroen Huinink <j.huinink@wanadoo.nl>:

> While working on the side-by-side DayView and WeekView I noticed some
> problems with the current column spanning algorithm that causes
> possible problems when there are different numbers of events in
> different rows. The problem is obvious in the weekview. Because events
> from one day run into the next day.

I'll try and take a look at this when I get a chance, but can you specify a
scenario that generates problems? I know the current algorithm isn't very
well documented, but it's been tested for a few years, works really well,
and generates elegant output. We've debugged a lot of kinks out of it; I'd
rather not toss it away without a good reason.

-chuck

--
Charles Hagenbuch, <chuck@horde.org>
"People ask me all the time what it will be like living without otters."
 - Google, thanks to Harpers