complete the documentation for JNWCollectionView.h
complete the documentation for JNWCollectionView.h

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