Added support for new audio effects: Bass Boost and Karaoke

• Bass Boost effect added
• Out Of Phase Stereo (Karaoke) effect added
• Both these audio effects are optional
• Comments in vaporiser.py rewritten for consistency
• README.md updated with details of new effects
• Section on making script executable added

Update to newer Python version

• Updated version of Python used from 3.6.9 to 3.10
• This update resolves security issues with modules in requirements.txt
• Additional instructions added to README.md
• Virtual environment created using venv instead of virtualenv
• Code formatted using Black with --preview flag
• Version of Black used included in virtual environment
• Added if __name__ == "__main__": statement to vaporiser.py

Initial release

v0.1.0

Update README.md