add note about cloning recursively
add note about cloning recursively

jwilling/JNWCollectionView,danielmartinprieto/JNWCollectionView,kettch/JNWCollectionView,konstantinpavlikhin/JNWCollectionView,Deadpikle/JNWCollectionView,regexident/JNWCollectionView,hachidorii/JNWCollectionView,chriseidhof/JNWCollectionView,Spark-Xl/JNWCollectionView