Restart repository as dedicated NFL code

I've decided to switch from general purpose code to having a dedicated
repository for each sport/league.  This commit starts to remove code
not related to the NFL.
Fix missing semicolon in sql code

This commit fixes a typo/bug in the SQL code to construct the
NFL database.
Debug code to generate score plots
Add code for twitter upload

Adds a python script to upload data to twitter and a Makefile to
(for now, at least) manage the files.