Merge pull request #204 from sylvainv/documentation/document-multipart-field-function

Documented the "field()" function for 'multipart/form-data' request bodies

Author: mikelax

Readme.md

@@ -99,6 +99,7 @@ describe('GET /users', function(){
 ```js
 request(app)
 .post('/')
+.field('name', 'my awesome avatar')
 .attach('avatar', 'test/fixtures/homeboy.jpg')
 ...
 ```