Comments and suggested changes

Nice work. The API is implemented correctly; I couldn't find any issues except the following: due to an error in the `business.html` template, it was impossible to use the form to update the category of the business. See sils-webinfo/visitors_bureau_final@967e48a

There were a couple of small issues with your microdata; see the following changes:

* sils-webinfo/visitors_bureau_final@7a8c003
* sils-webinfo/visitors_bureau_final@ddf1945

Finally, since you have information about the category of the business, it would probably be better to use the proper schema.org subclass ([`Store`](http://schema.org/Store), [`Restaurant`](http://schema.org/Restaurant), [`BarOrPub`](http://schema.org/BarOrPub), or [`NightClub`](http://schema.org/NightClub)) rather than `LocalBusiness` for everything.