Make sure appendFormat is always

When calling resources(name,actions) (so skipping the params parameter which seems to be supported), appendFormat is not set.
It should be done after the test on params for a function.

lib/railway_routes.js

@@ -227,13 +227,14 @@ Map.prototype.resources = function (name, params, actions) {
     var self = this;
     // params are optional
     params = params || {};
-    params.appendFormat = ('appendFormat' in params) ? params.appendFormat : true;
 
     // if params arg omitted, second arg may be `actions`
     if (typeof params == 'function') {
         actions = params;
         params = {};
     }
+
+    params.appendFormat = ('appendFormat' in params) ? params.appendFormat : true;
 
     // If resource uses the path param, it's subroutes should be
     // prefixed by path, not the resource's name