remove 0x from unicode code.
Fixed comment about bad unicode.
Filter out a few more unicode characters

and update the unicode comment in generated html.
Add fileformat link for unicode characters found and displayed.
Display range(s) of all footnotes, arranged in numerical order
Cope with empty title tag
Language and country are separated by - not _
Sort the list of languages found.
Ignore unicode CR-LF
Updated comment about unicode control characters.