This is needed for English versions of multilingual games, which use
UTF-8 strings, but we can treat them as plain ASCII, since wide and
UTF-8 strings are not yet supported in Wintermute. This allows at least
the English versions of these games to run.
This allows Reversion 2 and Shaban to start
This is mostly a lead-up to namespacing the Ad/Base folders, and then
possibly removing the prefixes from the files, it also has the added
benefit of getting rid of the odd case-typos that makes for issues
on platforms that don't ignore case.