Sendgrid

Added
- [Troubleshooting](TROUBLESHOOTING.md) section

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!

Added
- [Update register.py to use pypandoc](https://github.com/sendgrid/python-http-client/commit/6a3a63e2511b3df9c9ef23eebd5bcd80ad8821ae)
- [PR 21](https://github.com/sendgrid/python-http-client/pull/21): Support timeout. Thanks, [George Kussumoto](https://github.com/georgeyk)!
- [PR 22](https://github.com/sendgrid/python-http-client/pull/22): Client can be pickled and unpickled. Thanks, [Jussi Heikkilä](https://github.com/jussih)!
- [PR 26](https://github.com/sendgrid/python-http-client/pull/26): Create CODE_OF_CONDUCT.md. Thanks, [Fredrik Svensson](https://github.com/SvenssonWeb)!
- [PR 30](https://github.com/sendgrid/python-http-client/pull/30): Create TROUBLESHOOTING.md. Thanks, [Omer Ahmed Khan](https://github.com/OmerAhmedKhan)!
- [PR 33](https://github.com/sendgrid/python-http-client/pull/33): Update README.md badges and license. Thanks, [Alfred Gutierrez](https://github.com/alfg)!
- [PR 34](https://github.com/sendgrid/python-http-client/pull/34): Update .md files for SEO. Thanks, [Gustavo Siqueira](https://github.com/gugsrs)!
- [PR 36](https://github.com/sendgrid/python-http-client/pull/36): Added more badges to README.md. Thanks,, [Shivam Agarwal](https://github.com/gr8shivam)!
- [PR 41](https://github.com/sendgrid/python-http-client/pull/41): Added License link to README ToC. Thanks,, [Andrew Joshua Loria](https://github.com/ajloria)!
- [PR 49](https://github.com/sendgrid/python-http-client/pull/49): Add USAGE.md. Thanks, [Adelmo Junior](https://github.com/noblehelm)!
- [PR 43](https://github.com/sendgrid/python-http-client/pull/43): Add PULL_REQUEST_TEMPLATE. Thanks, [Aleksandr Sobolev](https://github.com/s0b0lev)!
- [PR 50](https://github.com/sendgrid/python-http-client/pull/50): Add Docker files and update README. Thanks, [Stanley Ndagi](https://github.com/NdagiStanley)!
- [PR 69](https://github.com/sendgrid/python-http-client/pull/69): Simplify GitHub PR template. Thanks, [Alex](https://github.com/pushkyn)!
- [PR 61](https://github.com/sendgrid/python-http-client/pull/61): License date range UnitTest. Thanks, [Anfernee Sodusta](https://github.com/dinosaurfiles)!
- [PR 60](https://github.com/sendgrid/python-http-client/pull/60): Adds test for repo files. Thanks, [Cheuk Yin Ng](https://github.com/cheukyin699)!
- [PR 47](https://github.com/sendgrid/python-http-client/pull/47): Add .env_sample file. Thanks, [Rod Xavier](https://github.com/rodxavier)!
- [PR 66](https://github.com/sendgrid/python-http-client/pull/66): Update travis.yml to fail on Pep8 errors. Thanks, [Stanley Ndagi](https://github.com/NdagiStanley)!
- [PR 67](https://github.com/sendgrid/python-http-client/pull/67): Made python-http-client comply with autopep8. Thanks, [Madhur Garg](https://github.com/Madhur96)!
- [PR 81](https://github.com/sendgrid/python-http-client/pull/81): PEP8 updates. Thanks, [~](https://github.com/delirious-lettuce)!
- [PR 73](https://github.com/sendgrid/python-http-client/pull/73): Add CodeCov support to .travis.yml. Thanks, [Senthil](https://github.com/senthilkumar-e)!
- [PR 77](https://github.com/sendgrid/python-http-client/pull/77): Include code review in README.md. Thanks, [Jared Scott](https://github.com/jlax47)!
- [PR 87](https://github.com/sendgrid/python-http-client/pull/87): Add manifest that includes the license in sdist. Thanks, [RohitK89](https://github.com/RohitK89)!

Fixed
- [PR 24](https://github.com/sendgrid/python-http-client/pull/24): Fix Typo in CONTRIBUTING.md. Thanks, [Cícero Pablo](https://github.com/ciceropablo)!
- [PR 23](https://github.com/sendgrid/python-http-client/pull/23): Fix Typo in README.md. Thanks, [Cícero Pablo](https://github.com/ciceropablo)!
- [PR 28](https://github.com/sendgrid/python-http-client/pull/28): Fix Travis CI Build. Thanks, [Kevin Anderson](https://github.com/kevinanderson1)!
- [PR 40](https://github.com/sendgrid/python-http-client/pull/40): Update contributing and readme - fix typo, ToC. Thanks, [Alex](https://github.com/pushkyn)!
- [PR 54](https://github.com/sendgrid/python-http-client/pull/54): Fix code style issues. Thanks, [Stephen James](https://github.com/StephenOrJames)!
- [PR 82](https://github.com/sendgrid/python-http-client/pull/82): PEP8 updates. Thanks, [~](https://github.com/delirious-lettuce)!
- [PR 83](https://github.com/sendgrid/python-http-client/pull/83): Fix Travis build errors. Thanks, [~](https://github.com/delirious-lettuce)!
- [PR 84](https://github.com/sendgrid/python-http-client/pull/84): Fix docstring variable name. Thanks, [~](https://github.com/delirious-lettuce)!
- Fix [Issue 86](https://github.com/sendgrid/python-http-client/issues/86): Error converting Response.to_dict.

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

Added
- Update docs, unit tests and examples to include Sender ID

Fixed
- Fixed logic errors related to issue 189