The APRS_LOGIN and APRS_PASSWORD arguments now fallback
to the config file if it exists.
First it checks the passed in parameters, then checks the
environement vars, then checks the parsed config to find the
login and password.
This patch also adds unit tests for the send-message command to
check the fallback.
This patch updates the ouput of the list-plugins command.
This also adds the ability to show the available plugins
to install that are published packages on pypi.org.
This also shows the list of installed packages from pypi.org
This patch refactors the cli to incorporate
the dev, send-message, listen commands into the main aprsd app.
This also moves the command line completion installer/show into
it's own subgroup.