Stylistic tidying
Remove unused const_buffers_1 version of buffer()
Replace binding pair result with std::tie
Cleaning up mixed socket example code
Adding async proxy support and example code
Adding async proxy support and example code
Move expected and scope_guard to util subdir
Merge branch 'master' of github.com:rodgert/aziomq4-x

Conflicts:
	src/aziomq/detail/zeromq_socket_service.hpp
	src/aziomq/socket.hpp
Merge pull request #5 from rodgert/master

Adding non-blocking socket proxy