output.py: Adds level arg for error(), for consistency
remotedb.py, tar.py: Implements ssl-fetch code

Migrate to using ssl-fetch (urllib3 based) for downloading files.
argsparser.py: Migrates from optparse to argparse

Also alphabetizes group arguments
Merge pull request #3 from twitch153/lib_migrate

Migrates layman to ssl-fetch (urllib3 based) library, and the argparse library.