Added - Solves [issue 195](https://github.com/sendgrid/sendgrid-python/pull/195) - The variable apikey and api_key are now interchangeable to help support those migrating from v2 - Thanks to [Ian Douglas](https://github.com/iandouglas) for the feedback!
3.0.7
Added - README updates - Update introduction blurb to include information regarding our forward path - Update the v3 /mail/send example to include non-helper usage - Update the generic v3 example to include non-fluent interface usage
3.0.6
Added - Update docs, unit tests and examples to include Sender ID