Adds L2 regularization to team strengths

Actually makes game predictions take home field advantage into account

Makes make-picks fail on first failure

Adds tools to compare picks for the current week

Now frees calloc'd memory

Adds ability to avoid picking teams that you've picked before

Adds ability to go "back in time" to treat past games as future ones

Adds cvxpy-based MLE strategy

Small update to util

Fixes bug in table parsing to deal with current season games

Adds cvxpy dep to readme

Updates README to cite data source

Moves C binary make-picks to choose-picks, to avoid confusion

Renames run.sh to make-picks

Small formatting changes to README