More work on the month view:

o Handle multi-day recurring incidences properly (it looks quite messy when it's about daily recursion, but it's correct);
o Multi day events >2 days were not added correctly to the view, fixed;
o MonthViewCell::removeIncidence shouldn't assume that an incidence appears at most one time in a cell. It's return value was bool, back to void (it's result wasn't evaluated anyway);
o Use getTextColor for the item text color. Prevents some unreadable items on a dark background.

I've tested with events with combinations of the following variables: being multi-day, floating or recursive. In all cases it seems to work.

I think the month view can survive until KDE 4 now :)