Rework the view_meeting page to make it simpler and prettier

Fixes https://fedorahosted.org/fedocal/ticket/128
When reseting the hash, set it to '_' to avoid scrolling up to the top of the page
No need for the `display in <tzone>` since the information is behind each date/time
No need for the timezone when displaying how the meeting is stored
Put the countdown in a paragraph
Use the date of the meeting the user clicked on instead of the date recorded in the DB

Now that we have the logic in place to find out which meeting the user
clicked on (made in the countdown pull-request) we can just use that
date/time to display the date of the meeting
Merge pull request #127 from fedora-infra/meeting_details

Meeting details