SQLite Driver does not correctly match the Driver interface.

It looks like the SQLite driver doesn't conform to the `core.Driver` interface. An example being

```go
func (dri *Driver) Init(filepath string) error {
	db, err := sql.Open("sqlite3", filepath)
	if err != nil {
		return err
	}

	dri.Db = db
	return nil
}
```

This package should be reviewed and updated to bring it back into conformity with the interface.