Warn when trying to publish without starting publisher #11
Description
Description
When trying to publish a message when the publisher is closed, you get no feedback.
It's better to send a warning or just crash when this happens.
Motivation
Information is king
Exemplification
Trying to debug why messages did not arrive at subscriber takes up a lot of time before realizing that you hadn't started the publisher.
Benefits
Information is king.
Possible Drawbacks
none