Add category filter to reverse query

query/reverse.js

@@ -17,6 +17,7 @@ query.sort( peliasQuery.view.sort_distance );
 query.filter( peliasQuery.view.boundary_circle );
 query.filter( peliasQuery.view.sources );
 query.filter( peliasQuery.view.layers );
+query.filter( peliasQuery.view.categories );
 
 // --------------------------------
 
@@ -65,6 +66,11 @@ function generateQuery( clean ){
     });
   }
 
+  // categories
+  if (clean.categories) {
+    vs.var('input:categories', clean.categories);
+  }
+
   return query.render( vs );
 }