Agenda view should support multi-lines for event description

[chuckn0rris]

Forum post

From Nige:

Calendar's AgendaColumn just needs a little work. Should be easy
line 139 could just measure targetElement.offsetHeight. It just needs .b-cal-agenda-grid-row .b-calendar-cell to have the rule contain : layout style
Then the row should size itself and so be measurable
Obviously you'd want .b-cal-event-body to have white-space : normal, and no height:25px stuffed into the .b-cal-event element, but I think there's an eventHeight : auto setting