Update README.md and test

Author: typicode

README.md

@@ -128,10 +128,16 @@ To slice resources, add `_start` and `_end`.
 
 ```
 GET /:resource?_start=&_end=
-GET /:resource?filter=&filter=&_start=&_end=
 GET /:parent/:parentId/:resource?_start=&_end=
 ```
 
+To sort resources, add `_sort` and `_order` (ascending order by default).
+
+```
+GET /:resource?_sort=&_order=(ASC|DESC)
+GET /:parent/:parentId/:resource?_sort=&_order=(ASC|DESC)
+```
+
 To make a full-text search on resources, add `q`.
 
 ```
@@ -155,4 +161,4 @@ Returns default index file or content of ./public/index.html (useful if you need
 ## Links
 
 * [Fast prototyping using Restangular and Json-server](http://bahmutov.calepin.co/fast-prototyping-using-restangular-and-json-server.html)
-* [grunt plugin](https://github.com/tfiwm/grunt-json-server)
+* [grunt plugin](https://github.com/tfiwm/grunt-json-server)

test/index.js

@@ -104,7 +104,7 @@ describe('Server', function() {
               .expect(200, done)
       })
 
-      it('should reverse sorting with order=DESC', function(done) {
+      it('should reverse sorting with _order=DESC', function(done) {
           request(server)
               .get('/tags?_sort=body&_order=DESC')
               .expect('Content-Type', /json/)