Added new styles for the upcoming seantis.reservation 1.1 release.

As forewarned by mail.

I hope this is it. There might be coming more maybe next week. For now the visual part of seantis.reservation 1.1 is pretty much fixed and we'll focus on the backend. We'll release a first experimental build of 1.1 towards this evening - so if plonetheme.onegov could have a release until then, I would much appreciate it.

Let me know if I did something weird.