File name		Description
FileUtil_hasImageExtension_String		Private constructor
FileUtil_hasHtmlExtension_String		Check if a file has a valid html extension
FileUtil_hasExtension_String_String		Check if a file name match extensions in a given list
FileUtil_zipFiles_Path_Path...paths		creates a zip file
FileUtil_addEntryToZip_ZipOutputStream_Path		
FileUtil_normalizeFileName_String		Converts French diacritics characters into non diacritics. <br />
		Replace whitespaces by underscores <br />
		Keep only underscores and alphanum characters <br />
		Transform to lowercase
FileUtil_deleteFile_File		Delete the file. <br />
		Logs an error if the delete is not succesful.
