Add command to determine Reddit sentiment about a ticker/company.

[jbushago]

Description

This PR adds a new command reddit_sent to the terminal under stocks/ba. This command searches through subreddits for a given ticker (or company name), aggregates/preprocesses its findings, and then determines the overall sentiment about the query (with an optional graphic).

It's a quick way to get a general understanding about how different communities feel about a company/ticker. An example usage is shown below:

No new dependencies are needed for the command.

How has this been tested?

All tests pass after these changes.

Others

@cweckerl, @montoys, and I all worked on the implementation and review.

[piiq]

@jbushago @cweckerl @montoys you are awesome! 🚀🚀🚀
Thank you for this contribution. I've already started playing with the functions that you've added (and thinking about incorporating them to my routines ... hehe)

I have left a bunch of suggestions in the code. Not mandatory

But there's one thing related to the sentiment chart that I would like you to change (see comment). Feel free to tag me if you have any questions

[jbushago]

@piiq
Thank you so much for the review! We really appreciate it :). We've gone ahead and implemented your suggestions, let us know if there's more to change.