Add the twitter library
Instantiate twit based on config file
First working example of tweeting
Listening for retweets by our account!
Tip Dogecoin for the retweets!
Refactor tweet handling for future expansion
Better logging output
Better logging info
Reply to a tweet, not just post normally
Add the ID of the tweet that was retweeted
Option to reply to the original tweet or not

Replying to the original can clutter the conversation thread and may not be
desirable. On the other hand, it is easier to see what tweets the bot is
replying to.
Add cache busting to tweets to avoid duplicate tweet error
Extract all the retweeting logic to its own file
Log tweets to a MongoDB table
Better variable names
Generalize the document saving method
Remove debugging output
Only payout if user hasn't already been paid out
Update the README