Refactor project

[jakewilliami]

I wrote this a while ago. I think a complete refactor and update of code would be good. Refine the API and maybe make the code faster.

[esabo]

I plan on importing this in my error correction package for the bounds. Otherwise, I would have to re implement them from scratch, which seems unnecessary.

[jakewilliami]

@esabo that's awesome, good luck for the package! Let me know if you find anything confusing. Anything at all—API, documentation, etc. I'll definitely take feedback on board. All the best.