Latin1 to ASCII

This takes a UNICODE String and replaces Latin-1 characters with something equivalent in 7-bit ASCII and returns a plain ASCII string. This function makes a best effort to convert Latin-1 characters into ASCII equivalents. It does not just strip out the Latin-1 characters. All characters in the standard 7-bit ASCII range are preserved. In the 8th bit range all the Latin-1 accented letters are converted to unaccented equivalents. Most symbol characters are converted to something meaningful. Anything not converted is deleted.