Adresses #1469 - Added campusmenu widget.
Adresses #1469 - Integrated campusmenu widget and used it on mensa page.
Adresses #1469 - Fixed date selection bug.
Adresses #1469 - Moved sitemap code into widget.
Adresses #1469 - Moved data loading out of widget.
Adresses #1469 - Implemented campus map selection code.
Adresses #1469 - Added map center for NeuesPalais and Golm, increased map height.