Bugfixes:

• Fix#185 -Commandline argument -t "js" in bot.py is not recognized. But it is mentioned in the readme.md.
• Disable tests involving compile_shell on Python 2.7 mode unless Python 3.5+ is installed due to a mozilla-central requirement.
• This temporarily lowers code coverage numbers reported to Codecov via Travis, until Python 3.5+ support is finished.
• Integrated the isort Python checker into flake8 linting process
• More automation / documentation / linting fixes

Notes:

• Windows is still on the 0.1.x legacy branch, until Python 3.5+ support is completed