Support multi-connections, python3 only

• fix bug that prevented multiple concurrent connections with authentication
• drop Python 2 support
• modernized python package

Small fixes and TravisCI self-tests

• Fixes #17, #14.
• TavisCI self-test framework.
• Published on PyPi

v0.6.1

• New get() api. see doc
• Small fix for sync telnet transactions.

0.5.5

license date, codady blank-space-issue