Feature/html body

[jmacdone]

I was having trouble getting this to convert the msg files released by Microsoft related to the disclosure of the Midnight Blizzard attack. So, I went down a troubleshooting rabbit hole. The core issue was overlooking HTML bodies.

• reorganized as a package (perhaps PyPI someday?)
• add a handler for HTML bodied messages (property tag 0x1013)
• filtered \x00 values being returned from UNICODE.value (not sure if bug?)
• various linting and formatting tune-ups (hopefully not too opinionated)
• updated README to reflect changes
• no unit tests 😳

[JoshData]

Thanks. I like the ideas.

But I can't accept changes that i can't easily review. The reorganization shows up on GitHub as large deletes and large insertions, so I can't see if anything changed.

I'd be happy to review if the reorganization is removed and left for another time.

[jmacdone]

I did break them into individual commits so you don't have to try to evaluate the whole PR as one change. But, I respect that it's hard to approve changes without unit tests to give confidence.

I made an alternative PR #30 if this is too overwhelming.