Adds Basic Styles for seantis.dir.base and seantis.dir.events.

A few things to note:

    - The idea is to run this initial styling by Nose, since they have
      not yet defined the design of the Veranstaltugnskalender. This
      commit merely makes the design usable.

    - Kml download links are disabled for now. Those links come with
      text now, but should come with the icon font in the future.

Please let me know if there's anything that should be done differently.