This PR contains fixes for both issues reported by Lastique and
MarcelRaad. It makes PR #197 obsolete.
Removed obsolete dependency of test/qi/expectd.cpp on
mxc/qitoo/qitoo.hpp. Was reintroduced by mistake.
Created qi/detail/expectation_failure.hpp. It defines the
expectation_failure template as a common dependency of expect directive
and expect operator. Removed expectation_failure from
operator/expect.hpp.
Changed version.hpp to 2.54. I did not notice that addl file in the
first place.
