Export: improved API routes

- use an explicit "boards" domain: /api/boards/:boardId
- pass authToken as a request parameter: /api/boards/:boardId?authToken=:token
- in the future, same route can be used with authToken set in the Authenticate: header easily

models/boards.js

@@ -88,7 +88,7 @@ Boards.helpers({
       return true;
     } else {
       // otherwise you have to be logged-in and active member
-      return this.isActiveMember(user._id);
+      return user && this.isActiveMember(user._id);
     }
   },