Changing the default scoring values

Until leagues score under their own settings, every fixture is scored under the Classic default, internal/settings/classic.json. See League settings for what each part does.

1. Edit the values in classic.json. Points are integer hundredths.
2. Run make test. settings.Classic() panics at start-up, and the tests fail, if the document is invalid.
3. Run openfanta recompute --reason "goal 3.5".

The changed document has a new hash, so the recompute adds a run under the new hash. Runs under the old hash stay in the history. The API serves the runs of the current default.