Added first / last class signifier.
Added first / last class signifier.

RobertoMalatesta/envisionjs,bigspotteddog/envisionjs,HumbleSoftware/envisionjs,notepad104/envisionjs,HumbleSoftware/envisionjs,notepad104/envisionjs,RobertoMalatesta/envisionjs,bigspotteddog/envisionjs,notepad104/envisionjs,RobertoMalatesta/envisionjs