- Remove the compile time check of the transport implementation.
The transport (zeromq/nanomsg) can be chosen at run time with:
`device.SetTransport("zeromq"); // possible values are "zeromq" and "nanomsg"`.
For devices that use FairMQProgOptions, the transport can be configured via cmd option:
`--transport zeromq` or `--transport nanomsg`. Default values is "zeromq".
The device receives the configured value with:
`device.SetTransport(config.GetValue<std::string>("transport"));`
Old method of setting transport still works. But the NANOMSG constant is not defined.
- Remove old `fairmq/prototest` directory. It was only used as a test for protobuf.
The protobuf part of Tutorial3 does the same (with different values).
- Fix a bug in FairMQPollerNN, where the `revents` value was not initialized.
This caused the `poller->CheckOutput()` to trigger when it should not.
