Update README.md.

Author: dlongley

README.md

@@ -3,30 +3,32 @@ An opinionated, isomorphic HTTP client for Node.js, browsers, and React Native.
 
 ### Usage
 
-#### Import httpClient (Node.js)
+#### Import httpClient (Node.js, browsers, or React Native)
 ```js
-import https from 'https';
 import {httpClient} from '@digitalbazaar/http-client';
 ```
 
-#### Import httpClient (browsers or React Native)
+#### Import and initialize a custom Bearer Token client
 ```js
 import {httpClient} from '@digitalbazaar/http-client';
+
+const accessToken = '12345';
+const headers = {Authorization: `Bearer ${accessToken}`};
+
+const client = httpClient.extend({headers});
+
+// subsequent http calls will include an 'Authorization: Bearer 12345' header
 ```
 
-#### Import and initialize a custom Bearer Token client
+#### Disable self-signed TLS/SSL cert checks for development purposes only
 ```js
+import {Agent} from 'https';
 import {httpClient} from '@digitalbazaar/http-client';
 
 const httpsAgent = new https.Agent({rejectUnauthorized: false});
-
-const accessToken = '12345';
-const headers = {Authorization: `Bearer ${accessToken}`};
-
 const client = httpClient.extend({headers, httpsAgent});
 
-// subsequent http calls will include an 'Authorization: Bearer 12345' header,
-// and use the provided httpsAgent
+// subsequent http calls will use the provided httpsAgent
 ```
 
 #### GET a JSON response in the browser