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.
Groups directories and events css
Remove !important from directory.scss
Get rid of absolute navigation gradient values
Remove !important from events
Gets rid of px where possible
Adds subgroups for events
Gets the recurrencewidget to a usable state.

The jquery.recurrenceinput.js looks awful on sunburst to the point of
being broken. This commit fixes the worst problems with it, making
it fit much better into plonetheme.onegov.
Adds styles for seantis.dir.contacts and seantis.dir.roadworks
Adds styles for seantis.dir.council
Adds styles for seantis.dir.facility
Adds styles for facility and reservation
Be more specific with .reservation .legend and .resource-listing, to avoid styling the wrong elements
Get rid of unused sass variable
Fixed i18n domain in configure.
Added customstyles form and viewlet. Build css file using pyScss.
Added boxsizing and tag mixin.