Make the CMSCompleteSchedulePlugin work

[MarkusH]

The plugin is located at pyconde.schedule.cms_plugins. Below is the design to be used.

[zerok]

@Markush2010, @mschufferth FYI

A few things we will most likely not be able to implement here:

• The time-frame column will only include the start of the timeslot, not a range.
• The "sleep" element probably won't make it due to time constraints to get this all roled out.

The styling implemented in the feature/schedule-plugin branch has two modi:

1. for when being used on the frontpage inside a container with the class 'area-3' which produces the darker background and makes the active day white
2. for when being used on the /schedule/schedule/ page with a white background, which makes the active day dark. This is also the default styling.

[MarkusH]

After deploying this to production the rooms should be loaded from the fixtures:

envdir ../env/ python manage.py loaddata fixtures/europython2014/09_rooms.json