* lang/cpp/src/tofuinfo.cpp, lang/cpp/src/tofuinfo.h: New class.
* lang/cpp/src/verificationresult.cpp (Signature::tofuInfo): New.
(VerificationResult::Private): Handle tofu info.
(GpgME::operator<<(std::ostream &os, const Signature &sig)): Include
TofuInfo in dump.
* lang/cpp/src/verificationresult.h (Signature::tofuInfo): New.
* lang/cpp/src/Makefile.am (main_sources, gpgmepp_headers): Add
new files.
* configure.ac (LIBGPGMEPP_LT_REVISION): Bump for new API.