Update README.md

Author: thinkingserious

README.md

@@ -8,8 +8,8 @@ Here is a quick example:
 
 ```javascript
 var Client = require('sendgrid-rest').Client
+var client = new Client()
 var emptyRequest = require('sendgrid-rest').request
-var client = new Client(globalRequest)
 var request = JSON.parse(JSON.stringify(emptyRequest))
 var param = 'myparam'
 request.host = 'api.example.com'
@@ -26,8 +26,8 @@ client.API(request, function (response) {
 
 ```javascript
 var Client = require('sendgrid-rest').Client
+var client = new Client()
 var emptyRequest = require('sendgrid-rest').request
-var client = new Client(globalRequest)
 var request = JSON.parse(JSON.stringify(emptyRequest))
 request.host = 'api.example.com'
 request.headers['Authorization'] = 'Bearer XXXXXX'