Add ->robot() to readme

Author: jenssegers

README.md

@@ -108,23 +108,23 @@ $languages = $agent->languages();
 Get the device name, if mobile. (iPhone, Nexus, AsusTablet, ...)
 
 ```php
-$agent->device();
+$device = $agent->device();
 ```
 
 ### Operating system name
 
 Get the operating system. (Ubuntu, Windows, OS X, ...)
 
 ```php
-$agent->platform();
+$agent = $agent->platform();
 ```
 
 ### Browser name
 
 Get the browser name. (Chrome, IE, Safari, Firefox, ...)
 
 ```php
-$agent->browser();
+$browser = $agent->browser();
 ```
 
 ### Desktop detection
@@ -145,6 +145,14 @@ Check if the user is a robot.
 $agent->isRobot();
 ```
 
+### Robot name
+
+Get the robot name. Note: this currently only works for mayor robots like Google, Facebook, Twitter, Bing, Baidu, ...
+
+```php
+$robot = $agent->robot();
+```
+
 ### Browser/platform version
 
 MobileDetect recently added a `version` method that can get the version number for components. To get the browser or platform version you can use: