Fix location of the jquery button

Fixes https://fedorahosted.org/fedocal/ticket/91
Make the height of the pop-up window 80% of the size of the screen

Apply this to the meeting detail pop-up as well as the markdown preview pop-up.

Fixes https://fedorahosted.org/fedocal/ticket/92
Fix adding the additional information link in the markdown description

Fixes https://fedorahosted.org/fedocal/ticket/93
Fix presentation of the meeting managers in the view_meeting template

Fixes https://fedorahosted.org/fedocal/ticket/94
Add the location to the iCal output

References https://fedorahosted.org/fedocal/ticket/95
Add the location in the view_meeting page

Fixes https://fedorahosted.org/fedocal/ticket/95
Disable the time fields if the full_day checkbox is checked when adding/editing a meeting

Fixes https://fedorahosted.org/fedocal/ticket/96
Update the stop time when the user changes the start time to keep the 1h default time

Fixes https://fedorahosted.org/fedocal/ticket/98
Invalid meetings having the same start and end date and time while adding/editing a meeting

Fixes https://fedorahosted.org/fedocal/ticket/99
Update the meeting end date when the meeting date is changed

Fixes https://fedorahosted.org/fedocal/ticket/97
Rename the 'Wiki page' field into 'More information URL' in the Add meeting form

Fixes https://fedorahosted.org/fedocal/ticket/77
Improve the presentation of the meeting list

- Color meetings occuring today
- Mark the difference between past and future meetings

Fixes https://fedorahosted.org/fedocal/ticket/100
Merge pull request #91 from fedora-infra/bugfixes

Bugfixes