fix POEx::ZMQ::FFI->find_soname

	modified:   lib/POEx/ZMQ/FFI.pm
Add ::FFI->z(un)pack methods, ::FFI::Socket outline

	modified:   lib/POEx/ZMQ/FFI.pm
	new file:   lib/POEx/ZMQ/FFI/Socket.pm
update Types wrt new FFI objs

	modified:   lib/POEx/ZMQ/Types.pm
Context; build _ffi non-lazily

	modified:   lib/POEx/ZMQ/FFI/Context.pm
::FFI::Socket method outline

	modified:   lib/POEx/ZMQ/FFI/Socket.pm
POD

	modified:   lib/POEx/ZMQ/FFI.pm
Role::Socket updates wrt ffi backend

	modified:   lib/POEx/ZMQ/Role/Socket.pm