Fix percent + remove cascading3 from CHANGES.md
Fix percent + remove cascading3 from CHANGES.md

tdyas/scalding,piyushnarang/scalding,tdyas/scalding,tresata/scalding,tresata/scalding,twitter/scalding,twitter/scalding,piyushnarang/scalding,tresata/scalding,twitter/scalding,cchepelov/scalding,tdyas/scalding,piyushnarang/scalding,jzmq/scalding,jzmq/scalding,jzmq/scalding,cchepelov/scalding,cchepelov/scalding