Restore styling of restrooms near guessed location

In [this commit](https://github.com/tkwidmer/refugerestrooms/commit/92d9965f71263f4a2bbf2c0cdd56290408b63862) I moved away from using `require_tree` (see [`require_tree` is evil](http://craiccomputing.blogspot.com/2012/10/rails-32-asset-pipeline-requiretree-is.html)) because it was including the Active Admin stylesheet and causing weird style overlaps. But I forgot to include the `bathrooms.css.scss` stylesheet, so the nearby restrooms weren’t getting the smaller-than-default styling. This fixes the styling.