pylint improvements for tlsnotary-test.py

pylint improvements for tlsnotary-auditee.py

pylint improvements for tlsnotary-auditor.py

pylint improvements for tlsn_common.py

pylint improvements for tlsn_message_wrapper.py

pylint improvements for irc_messaging.py

pylint improvements for tlsn_crypto.py
Merge pull request #70 from AdamISZ/master

pylint improvements