APICollective sort option

src/client/api/APICollective.js

@@ -1,8 +1,9 @@
 import EndPoint from './EndPoint';
 
 export default class APICollective extends EndPoint {
-    collective() {
+    collective(sort=null) {
         let url = '/collective';
+        if(sort) url = `/collective?sort=${sort.join(',')}`;
         return this.request.get(url, {cache: true});
     }
 }