Workaround for missing <gd:when endTime> for recurring events.
Workaround for missing <gd:when endTime> for recurring events.

Also renames .startTime and .endTime to .start and .end, to be
consistent with microformat events.

ChaosEngine/google-calendar-crx,YOTOV-LIMITED/google-calendar-crx,CooperLuan/google-calendar-crx,Steindi01/google-calendar-crx,thanhpd/google-calendar-crx,thanhpd/google-calendar-crx,Steindi01/google-calendar-crx,bonaime/google-calendar-crx,manastungare/google-calendar-crx,CooperLuan/google-calendar-crx,manastungare/google-calendar-crx,bonaime/google-calendar-crx,YOTOV-LIMITED/google-calendar-crx,ChaosEngine/google-calendar-crx