Initially clone of TranslationPathTest
clone() the byte array rather than go via base64 string
T3-1213: Use UTF-8 by default when converting byte arrays

... which might still be wrong for many references, e.g. from URL or
File.
test translation of "Ferronnière" between byte[] and String
Test with some UTF8 characters in the higher unicode code set
T3-1213: Add direct translators between byte[] and String
Update comment
Avoid StringBufferInputStream