--
* Arriving strings (i.e. user id names, error messages) are not
always in javascript encoding. This is an attempt to go through
the whole gpgme answer (with the exception of payload data) and
to fix the encoding of these
--
* src/Key.js: the fingerprint returned by a Key is now always upper
case hex, even if the constructor had lower case input. This is to be
more consistent with gpgme and to be more readable and reliable in
comparisions.