folder level support for FolderName added

Sample Folder Structure ASP.NET MVC
Project
+ Areas
+ Area1
+ Controller
+ Area2
+ Controller
+ Controller

Usage generate File in Root-Controller:
fileManager.StartNewFile(item.ClassName + ".cs",
folderName:"Controller", fileProperties:fileProperties);

Usage generate File in Controller of Area1
fileManager.StartNewFile(item.ClassName + ".cs",
folderName:"Area1.Controller", fileProperties:fileProperties);