add new methods relating to Advanced Personalization support

Author: haoAddsearch

README.md

@@ -362,9 +362,35 @@ client.setPersonalizationEvents(events);
 ### Advanced Personalization
 
 #### Set personalization token
+Set personalization token (for personalized search results). <br/>
+Use this method when personalization token is generated by your website.
+```js
+// Add a personalization token to the search/click event (if personalization in use)
+client.setPersonalizationToken('personalization_token');
+```
+
+#### Get personalization token from AddSearch cookie
+Get the personalization token which is stored in AddSearch cookie (if available).
 ```js
 // Add a personalization token to the stat events
-client.enablePersonalization(options);
+client.getPersonalizationTokenInCookie();
+```
+
+#### Enable personalization tracking
+Enable personalization tracking, personalization token will be included in every stat events. <br/>
+If personalization token is not set, a UUID is generated and will be sent to AddSearch's cookie.
+Specify how many days personalization token stay in cookie. By default, it's 180 days.
+```js
+// Defaults - isEnabled: false, expirationDays: 180
+client.enablePersonalizationTracking(isEnabled, expirationDays);
+```
+
+#### Enable AddSearch cookie
+Set it to false when users disallow usage of cookie. <br/>
+This method is used when you have a cookie consent popup, and a function handler in case users disallow usage of personalization cookie.
+```js
+// Default: true
+client.enableAddSearchCookie(isAllowedToSendCookie);
 ```