Import jquery everytime is not the best solution but remains the only way to not have errors atm
Add the meeting_id in the class name so that meetings do not conflict
Properly integrate the countdown script

- Use an identifier instead of a class, as it should be
- Do not duplicate jquery imports, as it should be
- Use $this instead of parsing the DOM again, as it should be
Fix displaying the dialog multiple time by not caching is and resetting it on close
Merge pull request #125 from fedora-infra/countdown

Countdown
Remove debug code
Move the dialog window showing the meeting details into its dedicated function
Update the URL when viewing a meeting's details

Relates to https://fedorahosted.org/fedocal/ticket/127
Display the dialog window if one was asked via the permalink

Fixes https://fedorahosted.org/fedocal/ticket/127
Simplify the calendar url mapping
Drop the hash when closing the dialog
Only remove the hash from the url if the window was not opened with that hash