Initial alpha. [1](https://github.com/simonw/google-calendar-to-sqlite/issues/1)
- `google-calendar-to-sqlite calendars` command to fetch a list of calendars
- `google-calendar-to-sqlite events` command to fetch a list of events
- `google-calendar-to-sqlite auth` command to authenticate with Google
- `google-calendar-to-sqlite revoke` command to revoke your stored token