Fix TODOs in the code.

[thecsw]

I will merge my branch soon, it is a huge branch that cleans up the code and makes it a bit faster. PEP8 compliance mostly. I left quite a bit number of TODOs, if you wish to support this project and familiarize yourself with our codebase, feel free to hunt them down and execute them mercilessly.

Some of them include:

• Adding docstrings
• Getting rid of broad try-except blocks
• Reducing the size of some functions (fewer branches and statements)

[Keanu73]

@thecsw You reckon this is still valid or not really needed since the rewrite in Go?

[Keanu73]

I think this issue can be closed since we'll adopt all of these practices in the Go rewrite (and we already have)