Add chaining example

Author: adbario

README.md

@@ -70,6 +70,13 @@ $dot = dot($array);
 $dot = dot($array, true);
 ```
 
+All methods not returning a specific value returns the Dot object for chaining:
+```php
+$dot = dot();
+
+$dot->add('user.name', 'John')->set('user.email', '[email protected]')->clear(); // returns empty Dot
+```
+
 ## Methods
 
 Dot has the following methods: