fix(routing): Switch from iron:router to clinical:router so we respect ROOT_URL (#115)

OHIFViewer/client/routes.js

@@ -1,4 +1,4 @@
-import { Router } from 'meteor/iron:router';
+import { Router } from 'meteor/clinical:router';
 import { OHIF } from 'meteor/ohif:core';
 
 Router.configure({