Function copy_file

Copy a file.

	static void CL_FileHelp::copy_file(
		const CL_String & from,
		const CL_String & to,
		bool copy_always);

Detailed description:

param: from = Where to copy from param: to = Where to copy to param: copy_always : true = Copy, even if destination already exists. false = Do not copy if destination exists (throw a CL_Exception )