Renames a folder on the local filesystem.
		
		This method can also be used to move a folder to a whole other destination.
		
		See Also: MakeFolder, CopyFolder, DeleteFolder
		
			Example - Rename
			
				function OnStart()
				{
				    app.RenameFolder( "/sdcard/MyFolder", "/sdcard/YourFolder" );
				}
			
			
		 
		
			Example - Move
			
				function OnStart()
				{
				    app.RenameFolder( "/sdcard/MyFolder", "/sdcard/DroidScript/MyFolder" );
				}