this patch removes the need for dacite2 package for creating
packet objects from the aprslib decoded packet dictionary.
moved the factory method from the base Packet object
to the core module.
This patch removed the dependency on flask-classful. This required
making all of the flask web routing non class based.
This patch also changes the aprsis class to allow retries for failed
connections when the aprsis servers are full and not responding to
login requests.
Hemna