verify changes to support unicode characters in CDF

The CDAWeb group has been working to support UTF-8 characters in CDF files.  Micheal Liu says that Nand had put in support for this, but we need to make sure this was done completely.  Also, there's a group with production CDF files using an old ISO charset that includes European characters, so the intent is that the encoding for the file will be declared and libraries must properly form strings.