* Add support to both the twitter and twitterstats modules for authenticating using both bearer tokens as well as consumer key + secret.
* A bearer token is defaulted to if it's supplied
* Add this support to both the twitterstats module as well as to the existing twitter module, modifying its functionality to re-use the same HTTP client and handle authentication upfront via oauth2
* Create module skeleton based off of the existing twitter module
* Strip out unused pieces and try to make it as minimal as possible
* Implement settings parsing, converting the untyped `screenNames` slice into an slice of strings
* Implement initial minimal display, showing a table with all usernames and their follower count + # of tweets (using dummy metrics for now)
