Fix displaying full day meetings

We were ignoring the meetings started the week before and ending the week
after at 00:00.
In fact what we want to ignore are meetings that starts the week before and
ending on the day the week starts at 00:00.

Fixes https://fedorahosted.org/fedocal/ticket/120
Merge pull request #118 from fedora-infra/fix_full_day

Fix displaying full day meetings