Figure out AuthN into Slack

[tlake]

Slack won't let us in unless we're authenticated (unsurprisingly, and a good thing too!). So, let's figure out how to tell Slack that we're cool!

[tlake]

This might make things relatively simple:

https://github.com/scrapy/loginform

[tlake]

Hmm. Having trouble sussing out where the login actually occurs. Slack's login button doesn't have an href that states the login url - that info seems to be hidden behind some JS that I haven't been able to decipher yet.

[tlake]

Found a workaround in Selenium!