+ `put` demo

README.md

@@ -118,7 +118,7 @@ You can also define whether lists can give away, give and keep a copy (`clone`),
 
  * name: `String` — group name
  * pull: `true|false|'clone'` — ability to move from the list. `clone` — copy the item, rather than move.
- * put: `true|false|["foo", "bar"]` — whether elements can be added from other lists, or an array of group names from which elements can be taken
+ * put: `true|false|["foo", "bar"]` — whether elements can be added from other lists, or an array of group names from which elements can be taken. Demo: http://jsbin.com/naduvo/2/edit?html,js,output
 
 
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